Tipp: Kitchen paper towels without print, unbleached or chlorine-free bleached actually should not impact the testing. It's the stuff used in laboratories here.RayClem said:Tissue paper is manufactured with a variety of chemical additives designed to impart specific characteristics (absorbency, softness, etc.) to the product. Some may contain colorants or even lotions. It could even have residual traces of bleaching chemicals. I have no idea whether these chemicals might affect the test, so I would not recommend it. If you want to dry the test tubes before storing them, the tissue paper is OK, but I just leave mine wet.
And guess who's family sold the paper in their stationary store.RayClem said:Yes, I know that Kimberly Clark makes a product called KimWipes and KimTech that are designed without additives so they will be safe for laboratory use. I suspect European paper manufacturers like Stora Enzo do as well. However, I would not use standard toilet tissue, towel paper or facial tissue for that purpose.
By the way- I spent my entire 41 year career as an engineer in the paper industry, so I am quite familiar with the entire process.