Boncuk
New Member
whiz115 said:it is supposed to be perfect for plants...![]()
... also for trees. The more copper it contains the faster the tree will die.
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whiz115 said:it is supposed to be perfect for plants...![]()
jpanhalt said:Possibly, you may perceive more selectivity of the dilute etchant for the unmasked areas. In reality, that probably is not the case. It is just that over etching occurs more rapidly with a faster solution. Subjectively, my best etchings have been done with a relatively rapid etch rather than a slow one.
If one were to use a mask that was slightly soluble in the etchant, say those who use ink jet printers and bake the image before etching, the length of time exposed to the aqueous etchant, not the concentration of ferric chloride or persulfate, may be more important for controlling selectivity. John
Pommie said:It would however be useful to know how it works as I have HCL and H2O2 in the garage most of the time. That makes me wonder how a mixture of NaHSO4 and Na2S2O8 would work as I have both of them as dry powders.
Mike.
Why is that?blueroomelectronics said:Hmm I'll use bigger letters.
NEVER add water to dry Ferric Chloride
jpanhalt said:Note that the commercial etchants such as the link by Pommie and this one (https://www.jtbaker.com/msds/englishhtml/f1080.htm) have ferric chloride at a concentration of about 40% by weight. That means, 40 g of ferric chloride (anhydrous) in 100 g of solution. That is considerably more concentrated than a couple of teaspoons (assuming a density of 4, that would be about 40 g) in 250 mL or about 14% w/w. I am sure the more dilute solution will work. I am just pointing out that it is considerably less concentrated than commercial etchant and may work more slowly.
Oznog said:IIRC doesn't etchant also contain a *small* amount of HCL? Or is HCL created when adding ferric chloride to H2O? I forget.
pitronix said:I gave a guy sodium hydrate cause he asked for it, luckly I asked him what he wanted to do with it. It turned out that he got some tutorial on net thet was supposed to use solution oh NaOH but instead some idiot wrote sodium hydrate. This koul have ben fatal mistake!!!![]()