This type of flux leaves a thin layer of residue on the pcb that can be easily cleaned off with a brush and alcohol. Just crush it and dissolve it in alcohol. Rosin helps to create friction between the bow hair and strings on violins and cellos. If you live in urban areas or are too lazy to get out in the woods to get pine resin you can buy ready made rosin in your local music instrument shop. Just remember that both the resin itself and also the alcohol is extremely flammable and may self ignite on relatively low temperatures, use proper ventilation and take precautions if you are going to heat it up. Maybe someone with more experience and/or education can comment on this matter. I have made flux both by heating the resin, and also without using heat at all, and I can't say I have noticed any difference in the quality of the end product. There are more ways of making rosin soldering flux, this is the most basic way but you will be surprised of how well the end product works compared to commercial variants. You should always use proper ventilation when soldering -Anyhow, this is how you make your own flux using only natural ingredients.Īll you need is the pine resin itself and some alcohol (rubbing alcohol/surgical spirit/ethanol 80vol% or stronger), I guess other solvents works as well but alcohol does not make toxic gases. I am not saying gases from rosin flux is harmless, but I really think they are less harmful than most of the products in the store. Some commercial flux variants contains a lot of chemicals that evaporates when heated, that again could leave toxic gases in the work environment. It chiefly consists of various resin acids, especially abietic acid." At room temperature rosin is brittle, but it melts at stove-top temperature. It is semi-transparent and varies in color from yellow to black. From Wikiless: "Rosin, also called colophony or Greek pitch, is a solid form of resin obtained from pines and some other plants, mostly conifers, produced by heating fresh liquid resin to vaporize the volatile liquid terpene components.
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