|Monthly Tech-Tip |
The problem: This dipping glaze is crawling (as shown on the glazed tile). Fortunately, the slurry has settled about an inch, that provides an opportunity for an immediate fix: Remove some of the water and replace it with gum solution. I want to replace about one tenth of the water (to be between a base coat dipping and brushing glaze). The bucket calculates to 2549g of powder so I need to remove 217g of water and replace it with gum solution. One way is to use a small sponge: Wet and wring it out and then repeat touching it to the water surface and wringing it out into a container until 217g. A propeller mixer is needed to mix in the added gum solution (it won't just stir in). Of course this degree of weight-precision may seen to be overkill, but having a record of what was actually done to adjust the slurry is important to repeating it the next time it is prepared or as a base for further adjustments.
CMC Gum Calculator - Worksheet
Use this to calculate how much gum and water to use when mixing a new glaze or how to calculate and replace some of the water in an existing glaze slurry with gum solution.