With your scale, any measurement you make has an error of + or - 0.5 g. That's not bad for large quantities of material, but iffy for smaller ones. If you weigh 10 g total, for example, your measurement could be as much as 5% off the mark. That means you'll get a fair amount of variation from batch to batch.
Also, with those larger capacity scales, the initial smallest weight the scale can measure is usually not 1 gram. That means the scale will hang on zero as you add more and more material, and then it suddenly jumps to 3 grams or whatever. That is not a recipe for happy success when weighing tiny amounts of stuff like Germall Plus.
I use a gram scale like yours for general soaping, but I am much happier with my lotions now that I have a decigram scale (measures to 0.1 g).
Also, with those larger capacity scales, the initial smallest weight the scale can measure is usually not 1 gram. That means the scale will hang on zero as you add more and more material, and then it suddenly jumps to 3 grams or whatever. That is not a recipe for happy success when weighing tiny amounts of stuff like Germall Plus.
I use a gram scale like yours for general soaping, but I am much happier with my lotions now that I have a decigram scale (measures to 0.1 g).