If u want to save the 11.00 and buy some stamps with it. I can try to send some to @BeTheLight in dry form, so it will be only 1 forever stamp.
i will send him for this formula so he can make 600ml or 1000ml
STS Mixing questions - #22 by Trickster
.05 g silver nitrate, mixed in 50 ml distilled water- part A. .39 g sodium thiosulfate pentahydrate