Re: dichromate stain and chemistry question
I might be late in mentioning this for I've not read all the posts. The 18% hydrochloric acid mentioned below is often title Muriatic Acid and is 32% hydrochloric acid. This product can be purchased in most swimming pool or spa supply stores. At concrete and rock stores a product known as Concrete Etch, for the cleaning of stone fireplaces and rock surfaces is sold. This is Phosphoric Acid. At any motorcycle shop you can purchase sulphuric acid because they generally fill the small batteries used in motorcycles. I have actually picked up a small container that is about one pint, for no cost. Best for this New Year Jack Fulton On January2007, at 7:02 AM, Loris Medici wrote: I perfectly undestand this. Anyway, teaching the involved chemicals, the dangers associated with them individually and the incompatibilities between each other (such as to never mix two chemicals - including water - when they're not instructed to do so and/or without being absolutely sure of the consequences) is an absolute must... BTW, 18% hydrochloric acid is a widely used (especially by low income consumers) cleaning product in Turkey: http://www.vikingtemizlik.com.tr/screen.php?op=urunler&ID=127&K=3 Regards, Loris. -----Original Message----- From: Christina Z. Anderson [mailto:zphoto@montana.net] Sent: 08 Ocak 2007 Pazartesi 16:26 To: alt-photo-process-l@usask.ca Subject: Re: dichromate stain and chemistry question ... But my real reason for not recommending them is that legally nowadays you really have to watch what you teach and suggest for people to use because if they are cavalier with these acids it's a lot more dangerous than being cavalier with developer or something. ....
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