Can any one say what are the easily avaliable photo checmicals to spray or paint on the bare pcb for either positive or negative print. If not can we make from...
OK, I made up some of this stuff...2/3 peroxide and 1/3 acid, and it worked fine the first time. Nice light green color when done, so I set it aside in a...
Good Heavens! The brew is so inexpensive, why try to save it? After etching the PCB, just neutralize the brew with sodium bicarbonate and flush it down the...
2/3 peroxide lets me think this was low concentration medical stuff. With that there is almost no way to continue using the etchant, since it adds too much...
The peroxide decomposes into water and oxygen real fast, so "some" peroxide will rejuvenate it a little, but consider that you started with *2/3* peroxide - a...
... I don't think you can easily formulate our own liquid photoresists that perform as today's commercial photoresists. Exact ingredients and manufacture...
... A pure CuCl2/HCl etchant can work with fairly wide range of copper concentrations. From memory the copper should be in the 70 to 120g/l range for optimum...
Adam is correct. Today's chemistry is pretty sophisticated. Buy the boards pre-coated, or use the sprray from a can. If you really want, you can get film that...
... Your web page says 1.2 to 1.4 specific gravity, hence my "check my math" posting - to get 3l (3kg) of water to 1.2 sg, you need 20% more mass, or another...
You have a lot of patience! I have not etched any PCBs for a few years but I used to do quick single sided ones for prototypes and fixtures. Smaller boards I...
... Well, if I'm in a hurry I can hand etch with hot FeCl and a sponge in under a minute. For now, with the CuCl, I just put it in and go do something else....
... i have tried with the "Diazol" for photo silkscreen, it must be mixing with his katalis(SR liquid), its have yellow/orange color.. it pretty after exposure...
... Hii everybody, i'm new in here, i'm sorry to mycroft2152 coz reply his message directly.. I'm very interested with dry film photoresist, but in my...
i have bake that, but i dont have the maximum or minimum limitation...i just bake then for 1-2 minute..i also have any problem with applying the photoresist...
... Hi. ... Please use whole words, not leet-speak. I haven't tried using the sponge technique with photoresist yet, but I have used it with toner transfer....
yes, like a gel but more creamy..you must try this,..i made from "diazol+SR(its catalis)" from photo silk screen emulsion., then i applied with copper at...
I'm modifying an Epson R380 inkjet printer for use as a direct resist printer using Mispro inks. Can I just load the black cartridge with the yellow Mispro...
If you "revigorate" it with a slug of HCl after etching a board or two, over time the Fe will oxidise and settle as insoluble FeO. Then just decant it. That's...
hi guys, I got to the point where I can etch 6 mils traces and 32 mils vias with a 12 mils hole with inkjet paper. To align both side, I tried inkjet...
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