DPD powder is grey, is it ok?


Well-known member
May 17, 2009
Jasper, TN
DPD powder a little over a year old (from tftestkits) is grey and I didn't really notice it until I got my new refill yesterday and it's snow white in color in comparison.

I guess my first batch started out totally white but just over time didn't notice the change.

Is it still good? I have maybe 10-15 tests left in it I think but got a refill just to have on hand.


TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
Silver Spring, MD
Yes, it is still good. As R-0870 gets older it gets darker. It is still good even if it is black. As it gets older it also tends to clump up. If it has clumped significantly, you should crush it back into a slightly lumpy powder.

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