{"product_id":"weighing-papers","title":"Heathrow Scientific Weighing Papers – Nitrogen-Free, 500\/Pack","description":"\u003cdiv style=\"max-width:1400px;margin:0 auto;font-family:'Open Sans',sans-serif;font-weight:300;color:#333;background:#fff;box-sizing:border-box;\"\u003e\n\u003ch3 style=\"font-size:1.05rem;font-weight:600;margin:0 0 16px 0;box-sizing:border-box;\"\u003eA smooth start. A simpler sample transfer.\u003c\/h3\u003e\n\u003cp style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003eMake the weighing surface part of your workflow—not an afterthought. Heathrow Scientific weighing papers combine a very smooth, nitrogen-free surface with strength to support dense material. Choose the sheet size that fits your balance setup and the room you need for handling.\u003c\/p\u003e\n\u003cul style=\"padding-left:20px;box-sizing:border-box;\"\u003e\n\u003cli style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003e\n\u003cstrong style=\"box-sizing:border-box;\"\u003eSmooth surface:\u003c\/strong\u003e Nitrogen-free paper supports good sample recovery.\u003c\/li\u003e\n\u003cli style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003e\n\u003cstrong style=\"box-sizing:border-box;\"\u003eDense materials:\u003c\/strong\u003e Strong enough to support dense samples during weighing.\u003c\/li\u003e\n\u003cli style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003e\n\u003cstrong style=\"box-sizing:border-box;\"\u003eThree square sizes:\u003c\/strong\u003e Choose 3 × 3, 4 × 4 or 6 × 6 in. to suit your setup.\u003c\/li\u003e\n\u003cli style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003e\n\u003cstrong style=\"box-sizing:border-box;\"\u003e500 sheets per pack:\u003c\/strong\u003e A consistent pack count across every size.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;align-items:center;gap:28px;border-bottom:1px solid #e0e0e0;padding-bottom:32px;margin-bottom:32px;box-sizing:border-box;\"\u003e\n\u003cfigure style=\"flex:1 1 320px;min-width:0;margin:0;text-align:center;box-sizing:border-box;\"\u003e\u003cimg alt=\"Heathrow weighing paper holding a powder sample on a balance; representative application\" loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/Heathrow-Scientific-WEIGHING-PAPERS-_623__23450.1717550247.jpg?v=1749331982\" style=\"width:100%;max-width:400px;height:auto;object-fit:contain;box-sizing:border-box;\"\u003e\u003cfigcaption style=\"font-size:0.85rem;line-height:1.5;color:#666;box-sizing:border-box;\"\u003eManufacturer application photo; representative of the paper family, not a size comparison. Balance and sample are not included.\u003c\/figcaption\u003e\u003c\/figure\u003e\u003cdiv style=\"flex:1 1 380px;min-width:0;box-sizing:border-box;\"\u003e\n\u003ch3 style=\"font-size:1.05rem;font-weight:600;margin:0 0 16px 0;box-sizing:border-box;\"\u003eKeep the focus on the sample\u003c\/h3\u003e\n\u003cp style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003eMoving a weighed portion to its next container calls for a surface that releases the sample well. Heathrow specifies a very smooth surface for good sample recovery, while the paper is strong enough to support dense material.\u003c\/p\u003e\n\u003cp style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003eThe choice here is straightforward: the same stated surface benefits, three sheet sizes, and 500 sheets in every pack. Use the size guide below, then select the matching catalog-number row in the ordering table.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003csection style=\"border-bottom:1px solid #e0e0e0;padding-bottom:32px;margin-bottom:32px;box-sizing:border-box;\"\u003e\u003ch3 style=\"font-size:1.05rem;font-weight:600;margin:0 0 16px 0;box-sizing:border-box;\"\u003eWhy labs choose Heathrow weighing papers\u003c\/h3\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:20px;box-sizing:border-box;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;min-width:0;border:1px solid #e0e0e0;border-radius:8px;padding:20px;background:#f9f9f9;box-sizing:border-box;\"\u003e\n\u003ch3 style=\"font-size:1.05rem;font-weight:600;margin:0 0 16px 0;box-sizing:border-box;\"\u003eSmooth by design\u003c\/h3\u003e\n\u003cp style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003eA very smooth surface supports good recovery when the weighed sample is transferred.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;min-width:0;border:1px solid #e0e0e0;border-radius:8px;padding:20px;background:#f9f9f9;box-sizing:border-box;\"\u003e\n\u003ch3 style=\"font-size:1.05rem;font-weight:600;margin:0 0 16px 0;box-sizing:border-box;\"\u003eNitrogen-free paper\u003c\/h3\u003e\n\u003cp style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003eThe manufacturer identifies the paper as nitrogen-free. Confirm suitability against your analytical method rather than assuming a purity or certification grade.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;min-width:0;border:1px solid #e0e0e0;border-radius:8px;padding:20px;background:#f9f9f9;box-sizing:border-box;\"\u003e\n\u003ch3 style=\"font-size:1.05rem;font-weight:600;margin:0 0 16px 0;box-sizing:border-box;\"\u003eStrength for dense material\u003c\/h3\u003e\n\u003cp style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003eDesigned to support dense material during weighing; no numeric load rating is published.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;min-width:0;border:1px solid #e0e0e0;border-radius:8px;padding:20px;background:#f9f9f9;box-sizing:border-box;\"\u003e\n\u003ch3 style=\"font-size:1.05rem;font-weight:600;margin:0 0 16px 0;box-sizing:border-box;\"\u003eOne pack format\u003c\/h3\u003e\n\u003cp style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003eAll three sizes contain 500 sheets, simplifying repeat orders when different benches use different sizes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection style=\"border-bottom:1px solid #e0e0e0;padding-bottom:32px;margin-bottom:32px;box-sizing:border-box;\"\u003e\u003ch3 style=\"font-size:1.05rem;font-weight:600;margin:0 0 16px 0;box-sizing:border-box;\"\u003eWhich sheet size do I need?\u003c\/h3\u003e\n\u003cp style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003eStart with your balance pan and the space available inside its weighing chamber. Allow room to handle the sheet without touching the chamber walls; the paper should not interfere with the weighing mechanism.\u003c\/p\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:20px;box-sizing:border-box;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;min-width:0;border:1px solid #e0e0e0;border-radius:8px;padding:20px;background:#f9f9f9;box-sizing:border-box;\"\u003e\n\u003ch3 style=\"font-size:1.05rem;font-weight:600;margin:0 0 16px 0;box-sizing:border-box;\"\u003e3 × 3 in. · 120116\u003c\/h3\u003e\n\u003cp style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003e7.6 × 7.6 cm. The smallest option when a compact sheet provides enough working area for your sample.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;min-width:0;border:1px solid #e0e0e0;border-radius:8px;padding:20px;background:#f9f9f9;box-sizing:border-box;\"\u003e\n\u003ch3 style=\"font-size:1.05rem;font-weight:600;margin:0 0 16px 0;box-sizing:border-box;\"\u003e4 × 4 in. · 120117\u003c\/h3\u003e\n\u003cp style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003e10.2 × 10.2 cm. The middle size when you want more handling area than the 3-inch sheet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;min-width:0;border:1px solid #e0e0e0;border-radius:8px;padding:20px;background:#f9f9f9;box-sizing:border-box;\"\u003e\n\u003ch3 style=\"font-size:1.05rem;font-weight:600;margin:0 0 16px 0;box-sizing:border-box;\"\u003e6 × 6 in. · 120118\u003c\/h3\u003e\n\u003cp style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003e15.2 × 15.2 cm. The largest sheet for setups with sufficient pan and chamber clearance. Larger dimensions are not a higher load rating.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003e\u003cstrong style=\"box-sizing:border-box;\"\u003eOrdering tip:\u003c\/strong\u003e Quantity 1 in a row means one pack of 500 sheets—not one sheet. No separate configuration dropdown is needed.\u003c\/p\u003e\u003c\/section\u003e\u003csection style=\"border-bottom:1px solid #e0e0e0;padding-bottom:32px;margin-bottom:32px;box-sizing:border-box;\"\u003e\u003ch3 style=\"font-size:1.05rem;font-weight:600;margin:0 0 16px 0;box-sizing:border-box;\"\u003eTypical applications\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;columns:2 240px;box-sizing:border-box;\"\u003e\n\u003cli style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003eRoutine weighing of solid samples where paper is suitable for the method\u003c\/li\u003e\n\u003cli style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003ePreparing weighed portions for transfer to another vessel\u003c\/li\u003e\n\u003cli style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003eTeaching laboratory weighing exercises\u003c\/li\u003e\n\u003cli style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003eStocking balances with a consistent 500-sheet pack format\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003eFollow your laboratory procedure for taring, sample handling and disposal. Chemical resistance, sterility, ash content and a maximum working load are not specified for these papers.\u003c\/p\u003e\u003c\/section\u003e\u003cdiv style=\"background:#f9f9f9;border:1px solid #e0e0e0;border-radius:8px;padding:24px;box-sizing:border-box;\"\u003e\n\u003ch3 style=\"font-size:1.05rem;font-weight:600;margin:0 0 16px 0;box-sizing:border-box;\"\u003eNeed a container rather than a flat sheet?\u003c\/h3\u003e\n\u003cp style=\"font-size:1rem;line-height:1.6;margin:0 0 14px 0;box-sizing:border-box;\"\u003eFor a shaped weighing surface, compare our \u003ca href=\"\/products\/mtc-bio-weigh-boats\" style=\"color:#1f6fb2;font-weight:600;box-sizing:border-box;\"\u003eMTC Bio square and diamond weigh boats\u003c\/a\u003e. For liquid weighing, explore the \u003ca href=\"\/products\/mtc-bio-weighbucket-40ml-liquid-weigh-boats\" style=\"color:#1f6fb2;font-weight:600;box-sizing:border-box;\"\u003e40 mL WeighBucket with handle and spout\u003c\/a\u003e. These are alternative formats, not accessories included with the paper; check their specifications against your method.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq_block\" style=\"border-top:1px solid #e0e0e0;margin-top:40px;padding-top:20px;box-sizing:border-box;\"\u003e\u003cdiv itemscope=\"\" itemtype=\"https:\/\/schema.org\/FAQPage\" style=\"width:100%;padding:20px 0;font-family:'Open Sans',sans-serif;font-weight:300;color:#333;box-sizing:border-box;\"\u003e\n\u003ch3 style=\"font-size:1.05rem;font-weight:600;margin:0 0 16px 0;box-sizing:border-box;\"\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cdetails itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Question\" style=\"border: 1px solid #e0e0e0; border-radius: 8px; margin: 0 0 10px 0; background: #fff;box-sizing:border-box;\"\u003e\u003csummary itemprop=\"name\" style=\"cursor: pointer; padding: 14px 16px; font-size: 1rem; font-weight: 600; list-style-position: inside;box-sizing:border-box;\"\u003eHow many sheets are in a pack?\u003c\/summary\u003e\u003cdiv itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Answer\" style=\"padding: 0 16px 14px 16px;box-sizing:border-box;\"\u003e\u003cp itemprop=\"text\" style=\"font-size: 0.97rem; line-height: 1.6; margin: 0;box-sizing:border-box;\"\u003eEach size is supplied as one pack of 500 sheets. A quantity of 2 means two packs, or 1,000 sheets of the selected size.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Question\" style=\"border: 1px solid #e0e0e0; border-radius: 8px; margin: 0 0 10px 0; background: #fff;box-sizing:border-box;\"\u003e\u003csummary itemprop=\"name\" style=\"cursor: pointer; padding: 14px 16px; font-size: 1rem; font-weight: 600; list-style-position: inside;box-sizing:border-box;\"\u003eWhich catalog number matches each size?\u003c\/summary\u003e\u003cdiv itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Answer\" style=\"padding: 0 16px 14px 16px;box-sizing:border-box;\"\u003e\u003cp itemprop=\"text\" style=\"font-size: 0.97rem; line-height: 1.6; margin: 0;box-sizing:border-box;\"\u003e120116 is 3 × 3 in. (7.6 × 7.6 cm); 120117 is 4 × 4 in. (10.2 × 10.2 cm); 120118 is 6 × 6 in. (15.2 × 15.2 cm).\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Question\" style=\"border: 1px solid #e0e0e0; border-radius: 8px; margin: 0 0 10px 0; background: #fff;box-sizing:border-box;\"\u003e\u003csummary itemprop=\"name\" style=\"cursor: pointer; padding: 14px 16px; font-size: 1rem; font-weight: 600; list-style-position: inside;box-sizing:border-box;\"\u003eWhat does the smooth surface help with?\u003c\/summary\u003e\u003cdiv itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Answer\" style=\"padding: 0 16px 14px 16px;box-sizing:border-box;\"\u003e\u003cp itemprop=\"text\" style=\"font-size: 0.97rem; line-height: 1.6; margin: 0;box-sizing:border-box;\"\u003eHeathrow describes the very smooth surface as supporting good sample recovery. It does not publish a recovery percentage, so do not assume complete transfer for every material.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Question\" style=\"border: 1px solid #e0e0e0; border-radius: 8px; margin: 0 0 10px 0; background: #fff;box-sizing:border-box;\"\u003e\u003csummary itemprop=\"name\" style=\"cursor: pointer; padding: 14px 16px; font-size: 1rem; font-weight: 600; list-style-position: inside;box-sizing:border-box;\"\u003eAre these papers nitrogen-free?\u003c\/summary\u003e\u003cdiv itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Answer\" style=\"padding: 0 16px 14px 16px;box-sizing:border-box;\"\u003e\u003cp itemprop=\"text\" style=\"font-size: 0.97rem; line-height: 1.6; margin: 0;box-sizing:border-box;\"\u003eYes. The manufacturer describes these weighing papers as nitrogen-free. It does not specify an analytical certification or numerical nitrogen limit on the product page.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Question\" style=\"border: 1px solid #e0e0e0; border-radius: 8px; margin: 0 0 10px 0; background: #fff;box-sizing:border-box;\"\u003e\u003csummary itemprop=\"name\" style=\"cursor: pointer; padding: 14px 16px; font-size: 1rem; font-weight: 600; list-style-position: inside;box-sizing:border-box;\"\u003eCan the paper support dense material?\u003c\/summary\u003e\u003cdiv itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Answer\" style=\"padding: 0 16px 14px 16px;box-sizing:border-box;\"\u003e\u003cp itemprop=\"text\" style=\"font-size: 0.97rem; line-height: 1.6; margin: 0;box-sizing:border-box;\"\u003eYes, the manufacturer states that it is strong enough to support dense material. No maximum mass is specified; follow your method and balance requirements.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Question\" style=\"border: 1px solid #e0e0e0; border-radius: 8px; margin: 0 0 10px 0; background: #fff;box-sizing:border-box;\"\u003e\u003csummary itemprop=\"name\" style=\"cursor: pointer; padding: 14px 16px; font-size: 1rem; font-weight: 600; list-style-position: inside;box-sizing:border-box;\"\u003eWill every size fit my balance?\u003c\/summary\u003e\u003cdiv itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Answer\" style=\"padding: 0 16px 14px 16px;box-sizing:border-box;\"\u003e\u003cp itemprop=\"text\" style=\"font-size: 0.97rem; line-height: 1.6; margin: 0;box-sizing:border-box;\"\u003eNot necessarily. Compare the sheet dimensions with your balance pan and weighing-chamber clearance. Choose a size that leaves room for handling and does not interfere with the balance.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Question\" style=\"border: 1px solid #e0e0e0; border-radius: 8px; margin: 0 0 10px 0; background: #fff;box-sizing:border-box;\"\u003e\u003csummary itemprop=\"name\" style=\"cursor: pointer; padding: 14px 16px; font-size: 1rem; font-weight: 600; list-style-position: inside;box-sizing:border-box;\"\u003eIs this filter paper, or paper for liquid weighing?\u003c\/summary\u003e\u003cdiv itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Answer\" style=\"padding: 0 16px 14px 16px;box-sizing:border-box;\"\u003e\u003cp itemprop=\"text\" style=\"font-size: 0.97rem; line-height: 1.6; margin: 0;box-sizing:border-box;\"\u003eThis product is sold as weighing paper, not as filter paper or a liquid-holding container. Filtration performance and liquid resistance are not specified. Use an appropriate weighing vessel when your method requires containment.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Question\" style=\"border: 1px solid #e0e0e0; border-radius: 8px; margin: 0 0 10px 0; background: #fff;box-sizing:border-box;\"\u003e\u003csummary itemprop=\"name\" style=\"cursor: pointer; padding: 14px 16px; font-size: 1rem; font-weight: 600; list-style-position: inside;box-sizing:border-box;\"\u003eDoes the pack include the balance shown in the photo?\u003c\/summary\u003e\u003cdiv itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Answer\" style=\"padding: 0 16px 14px 16px;box-sizing:border-box;\"\u003e\u003cp itemprop=\"text\" style=\"font-size: 0.97rem; line-height: 1.6; margin: 0;box-sizing:border-box;\"\u003eNo. The photograph illustrates weighing paper in use. The ordered pack contains 500 sheets of the selected size; the balance and sample are not included.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Heathrow Scientific","offers":[{"title":"3 x 3 in","offer_id":50280219115818,"sku":"BTS-120116","price":36.0,"currency_code":"USD","in_stock":true},{"title":"4 x 4 in","offer_id":50280219148586,"sku":"BTS-120117","price":53.0,"currency_code":"USD","in_stock":true},{"title":"6 x 6 in","offer_id":50280219181354,"sku":"BTS-120118","price":103.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/Heathrow-Scientific-WEIGHING-PAPERS-_623__23450.1717550247.jpg?v=1749331982","url":"https:\/\/bluetigerscientific.com\/products\/weighing-papers","provider":"Blue Tiger Scientific","version":"1.0","type":"link"}