A 1:1 Battery acid to water ratio by volume will provide larger pores and a faster dissolution rate than weaker ratios, This alone can create all sorts of new problems if dyeing characteristics are critical. I've never heard of a 2:3 ratio being used. I would use a 1:2 ratio from 6 to 15 ASF, and switch to 1:1 above 15 ASF. I have done Type II anodizing as high as 24 ASF, in order to form "Type II 1/2", this was to grow coatings measuring over 75um (3 mils) thick. This excludes Type III (Hardcoat) where you are back to a weak electrolyte, and low temperatures.
You imply that you aren't getting good results with LCD. Most others who switch from LCD to higher current densities do so to speed up anodizing time. What is going on in your case, what are the symptoms?
BTW; for dyeing, coatings thicker than about 0.7 mils do no good, the dye (any dye) won't penetrate any deeper than that.
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