Quote Originally Posted by Nicholas Lindan View Post
Making the cyanotype on an unglazed tile and then glazing it might work better.
Do NOT heat cyanotype chemicals - see below
Reactivity:


Releases hydrogen cyanide gas if heated, if hotacid is added, or if exposed to strongultraviolet light (McCann, 1994)
http://ntp.niehs.nih.gov/ntp/htdocs/...rricyanide.pdf


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