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i bought most of indigrients via internet platform (regional one), about 50$ for chemical ingredients, and about 100$ for equpimernt (like magnetic stirrer). I keep myself as far as i can from Photographic kit and things for photography, because they always are few times more expensive.
even glass i get from local glazier.
only thing witch i bought specialized was photo - grade gelatin.
If you want to read more check:
Lost light art
and light farm
the cheapest way to make your own emulsion is cyanotype - don't buy a kit (cost much more)
i hate captha on these site,
I will write you more if you are interesed