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Quick Details
Filtered pipette tips are generally made of natural polypropylene, while cheap tips are likely to use recycled polypropylene plastic (in this case, we can at most say that its main component is polypropylene).
In addition, most of the tips will add a small amount of additives during the manufacturing process, the common ones are:
1. Color-developing material.
The blue tip (1000ul) and yellow tip (200ul) commonly known in the market are the addition of corresponding color-developing materials to polypropylene (we hope it is a high-quality masterbatch, not a cheap industrial pigment)
2. Release agent.
helps the tip to be separated from the mold quickly after forming. Of course, the more additives, the higher the probability of undesirable chemical reactions during pipetting. So it is best not to add additives! However, due to the relatively high requirements for the production process, nozzles without additives are rare in the market.
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