The tricky part is that glue, no matter how dry it is, still contains water. The dry glue concentration for bone and leather glues varies, but typically ranges from 20-40% for bone glue and 5-15% for leather glue. This should be taken into consideration when creating a solution. The solution will contain added water plus water already contained in dry glue. The calculator below can save you some time by solving several proportions at once and showing you how much dry glue and water are needed to get required mass of solution with required strength (concentration).
You only need to enter the dry glue concentration in percents, required solution strength in percents, and the required mass of the solution in grams. The calculator will then automatically calculate the required mass of dry glue and water needed to make the desired glue solution.
Whether you're working on a DIY project or in an industrial setting, this calculator will save you time and money by ensuring that you have the correct proportions of glue and water for your project.