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Flat-Bottom Assay Plates in Clear, Black, and White
The plate color matters as much as the chemistry. Clear wells let light through for absorbance and colorimetric reads, black wells quench stray light for fluorescence, and white wells reflect signal back to the detector for luminescence.
Pick your plate in the first menu, 96-well or 384-well, or a matching lid, then choose color and packaging in the second: non-sterile by the case, or sterile and individually wrapped. These ILP polystyrene plates have a standard SBS footprint and molded alphanumerics.
96 & 384
Well formats
3 Colors
Clear, black, white
2,000 × g
Max RCF
SBS
ANSI/SLAS footprint
Why Labs Choose These Assay Plates
Color for Every Read
Clear for absorbance, black for fluorescence, white for luminescence.
Optical-Grade Polystyrene
Clear plates use high-transmission polystyrene for top or bottom reads in the visible range.
Uniform Walls
Consistent well geometry for reproducible readings across the plate.
Robot-Ready
Rigid, SBS-compliant plates for stackers, grippers, and plate readers.
Molded Alphanumerics
Row and column labels are molded in, so they never rub off.
Certified Clean
Tested lot to lot for RNase, DNase, and pyrogens.
Which Plate Do I Need?
Choose the color by your detection method, then the format by throughput. Need to seal between steps? See our assay and storage plate seals.
Clear
Detection: Absorbance and colorimetric (ELISA, BCA, Bradford)
Reads: Top or bottom, visible range
Also for: Microbiology and serology
Black
Detection: Fluorescence
Why: Quenches stray light and lowers autofluorescence
Reads: Top read
White
Detection: Luminescence
Why: Reflects signal and reduces well-to-well crosstalk
Reads: Top read
96 vs. 384
96-well: 340 µL working volume, round wells
384-well: 110 µL working volume, square wells
Tip: 384 saves reagent in high-throughput screens
384-Well Plates for High-Throughput Screening
The 384-well plates put four times the samples on the same footprint, with 110 µL square wells that cut reagent use in screening assays. Rounded well corners help prevent the capillary wicking that can happen in sharp-cornered wells.
Sterile 384-well plates come individually wrapped with a clear polystyrene lid, 40 per case, ready for single-plate use.
Lids for Plates in Progress
A clear polystyrene lid keeps dust out and slows evaporation between steps, while letting you see the plate.
Choose a universal-fit lid, or an H1 corner-notch lid that only seats one way, so the lid always goes back in the same orientation and wells are not cross-contaminated. Notched lids also come individually wrapped.
Typical Applications
- ELISA and colorimetric assays
- Fluorescence assays
- Luminescence and reporter assays
- Protein quantitation (BCA, Bradford)
- Microbiology and serology
- High-throughput screening
Tip for Lower Background
Match the plate to the read: a white plate in a fluorescence assay or a clear plate in a luminescence assay can raise background and crosstalk. Seal between incubations with easy-peel ELISA film or white luminescence film. For storage or sample prep in polypropylene, see our 96-well storage plates and 384-well deep-well plates.
Frequently Asked Questions
Are these a good alternative to Corning® Costar® or Greiner Bio-One assay plates?
Yes, for most non-tissue-culture applications. They are 96- and 384-well flat-bottom polystyrene plates in clear, black, and white, sterile or non-sterile, with a standard SBS footprint. Confirm your reader settings before switching. Corning®, Costar®, and Greiner Bio-One are trademarks of their respective owners; Blue Tiger Scientific is not affiliated.
Which color should I use?
Clear for absorbance and colorimetric assays, black for fluorescence, and white for luminescence.
Are these plates tissue-culture treated?
No. They are non-treated polystyrene for general assays, microbiology, and serology. For adherent cell culture, use a tissue-culture-treated plate.
Can I centrifuge or autoclave them?
They can be centrifuged up to 2,000 × g. They are polystyrene and are not autoclavable; use them from −40 °C to 70 °C.
Do the sterile plates include a lid?
The sterile black and white 96-well plates and all sterile 384-well plates are individually wrapped with a lid. Lids are also sold separately, universal fit or H1 notched.
What does the H1 notch do?
An H1-notched lid fits only one way, so it always returns to the plate in the same orientation, which helps prevent cross-contamination between wells.
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