In this post, Equipment for newbies, Nerium asks: I have been a long time reader and finally took the plunge and made my first solid shampoo and conditioner today using your recipes and tutorials for guidance. Thank you so much for sharing all of this excellent information. Unfortunately, it's not feasible for me to have a separate workshop, so I did it in my kitchen using my regular kitchen utensils and dishes. Do you think it's necessary to keep a separate set of equipment for making cosmetics? I don't see a problem as long as things are well washed afterwards, but would love to hear what you think.
In general, I think anything wooden or plastic should be reserved for cosmetic making, while metal or glass could do double duty. Wooden spoons or plastic spatulae should be single use, while a Pyrex jug cold do both.
Having said this, I do think having cosmetic exclusive equipment is a good idea as we do put our things through so much! When I compare my husband's food scale to my cosmetic scale, I can see the damage I've done to it with loads of grease in the form of oils and butters, acids like citric or lactic, and general goopiness from surfactants. I'm not saying I wouldn't measure food in a container on it, but it looks pretty awful! The same goes for my Pyrex jugs. I abuse the heck out of these compared to those I use in the kitchen, and I definitely have them separate.
If you're looking for bits and pieces, the dollar store is an invaluable resource when we're looking for things. Spatulae, spoons, forks, plastic jugs, funnels - so much is so cheap there!
In reality, almost all of our products are safe enough to eat. They'd taste terrible, but it's possible. (No, I'm not going on Jimmy Fallon to dip chips into my lotions. You'll just have to trust me on this, or try it at home yourself. I have no desire to use my kukui nut & babassu body butter as a sauce!)
Which ones aren't safe to eat? I'd argue that anything with a low pH that contains AHAs, salicylic acid, or glycolic acid probably aren't.