from what i've just read the lower concentrations dont make it safer, it just takes a bit longer to affect you - this is not like a normal acid, diluting it just slows it down, it doesnt make it any less dangerous
Solutions of 14.5% and higher concentrations immediately produce symptoms.
Solutions of 12% may take up to an hour to produce symptoms.
Solutions of less than 7% may take several hours before onset of symptoms, resulting in delayed presentation, deeper penetration of the undissociated HF acid, and a more severe burn.
Dip n Etch is a 9% solution
gloves, face and eye protection are a must but you should also know how to immediatly treat the burns, washing the acid off is not enough because it is immediatly absorbed into the skin
Quote:
For digital burns, if calcium gluconate gel is not available, the fingers may be soaked in magnesium hydroxide–containing antacid preparations (eg, Mylanta) en route to a medical facility. Retain gel/antacid in a latex glove if practicable, and the gloved hand may be immersed in iced water.
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inhaling the fumes is also just as dangerous so you should be wearing a mask when you're etching beads