In this post, Ellbie asks: Can you at some time during this Newbie series talk about a good technique for weighing your preservative? Specifically Germall Plus liquid. I have the dangest time trying to figure an accurate means of weighing this viscous liquid out. I am a tween (not really a newbie and with enough knowledge to be dangerous). THANKS!
Great question! This is one of those things that drives even the most experienced formulators crazy! Small amounts are the bane of my existence, so I bought myself this adorable little scale from a jewellery shop. It weighs down to 0.1 gram, so I can use it for things like extracts, colours in mineral make-up, and preservatives.
Melian1 commented: I found a lovely little scale that weighs to .01 gram at tkb. in case anyone already has got the scale to 1 gram and wants to make those tiny batches. it is called the "awesome" scale. (Click here for the product at TKB Trading!)
I've found when weighing tiny amounts, especially on my 1-gram weighing scale that if i put a drop in, pick the container up and place it back down, it will give me a better reading. In a thread some time back on the dish, Ande (of Brambleberry) or Jen (Lotioncrafter) - not sure which - explained why that works better than just continuing to drip stuff in, because you can get 2 or 3 grams (or more) of stuff in that way before it goes up to the next gram. Anyway, by lifting and then setting it back down, it works.
I have two thoughts - one, I generally suggest making a batch of 200 grams so you can use 1 gram of liquid Germall Plus or two, get a smaller scale and weigh it out that way. In the case of the 200 gram batch and a scale that weighs to 1 gram, weigh your entire container and product because most scales have trouble going from 0 to 1, and you could have 5 in there before you know it.
What suggestions do you have for weighing small amounts? Share your thoughts!