HOw to fix the packet of HCA ?
- Thread starter locksley
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Huh? sorry, the last bootle I made is so many years back, can't remember liao.locksley said:
Maybe make all and share with other people.
erm first you mix it into stock solution from the powder.
then from the stock solution u mix it down (dilute) into working solution (this is the one u use as the hca).
u can make 19 litres of working solution with the 502g of powder in the packet using 15 litres of water. so u just dump the whole bag in a big pail, pour 15 litres of water in. BUT, that is not practical because where u want to store so much solution?! haha. hca is reusable.
so for a typical 2-roll tank (those plastic ones) u only need about 600ml to 1 litre. i keep about 600ml myself that i reuse each time i develop.
the packet says to make 3.8 litres of stock solution, use 3 litres of water, with the 502grams of powder in the packet (if yours is the 502g one lah).
so, for every 1 litre of stock u need (3L) / (3.8) * 1 = 800mL of water or so. then, u need 502g / (3.8) * 1 = 130g or so. 130g = 4.5 ounces, and 4 ounces = 1/2 a cup (those baking measuring cups).
so what i did was i measured 800mL of water, 1/2 cup of stock powder, to get 1 L of stock solution.
then i diluted the stock solution using 1:4 ratio (because 3.8L of stock makes 19L of working solution), to get my working solution.
that's it!
then from the stock solution u mix it down (dilute) into working solution (this is the one u use as the hca).
u can make 19 litres of working solution with the 502g of powder in the packet using 15 litres of water. so u just dump the whole bag in a big pail, pour 15 litres of water in. BUT, that is not practical because where u want to store so much solution?! haha. hca is reusable.
so for a typical 2-roll tank (those plastic ones) u only need about 600ml to 1 litre. i keep about 600ml myself that i reuse each time i develop.
the packet says to make 3.8 litres of stock solution, use 3 litres of water, with the 502grams of powder in the packet (if yours is the 502g one lah).
so, for every 1 litre of stock u need (3L) / (3.8) * 1 = 800mL of water or so. then, u need 502g / (3.8) * 1 = 130g or so. 130g = 4.5 ounces, and 4 ounces = 1/2 a cup (those baking measuring cups).
so what i did was i measured 800mL of water, 1/2 cup of stock powder, to get 1 L of stock solution.
then i diluted the stock solution using 1:4 ratio (because 3.8L of stock makes 19L of working solution), to get my working solution.
that's it!
A note aside:
I am reminded why I moved away from d76.
Hate powder..argh. Concentrated solution takes too much space...poofs out within a few months if you don't use it (you can buy those special bottles here in australia where you can squeeze the air out..but they're expensive!!),
and to make use of the developer you have to shoot alot more film so as not to waste a drop of it..
Give me rodinal and HC110 everytime. Can be found anywhere, and don't have to lug huge bottles everywhere with me when I need to develop on the spot.
I am reminded why I moved away from d76.
Hate powder..argh. Concentrated solution takes too much space...poofs out within a few months if you don't use it (you can buy those special bottles here in australia where you can squeeze the air out..but they're expensive!!),
and to make use of the developer you have to shoot alot more film so as not to waste a drop of it..
Give me rodinal and HC110 everytime. Can be found anywhere, and don't have to lug huge bottles everywhere with me when I need to develop on the spot.
hmmm there are actually those bottles in singapore where u can evacuate the air after filling it with liquid; i saw some at this old shop at hong lim complex, along the same row as KT imaging. don't know how much they cost though. or u can get a bottle whose capacity is as close to the volume u want to fill it up with so that there is as little air in the bottle as possible.
Put marble (goli) in the developer bottle.
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