In 2023 I organized a group order of DAS to have a custom batch of 160kg manufactured. Since most carbon printers bought a lifetime supply, it’s unlikely there will be enough interest to repeat this for a long time, but maybe I’m wrong. Send me an email to be placed on a mailing list for the next group order.

4,4′-Diazidostilbene-2,2′-disulfonic Acid Disodium Salt Tetrahydrate CAS 2718-90-3, also known as DAS, is used as a less toxic alternative to dichromate in carbon, collotype, photogravure, casien, and PVA printing. Click here for more information about DAS.