52-litre gas Raku kiln – complete set (item no. 1225), ready for immediate use! NOW WITH A 25% DISCOUNT (valid from 5 to 20 October)

Gillespie Borate 1kg (Replacement for Gerstley Borate)

Product no. 1625

€ 13,50 incl. VAT

Description

Because Gerstley Borate is unfortunately no longer available, we have been looking for the best possible replacement.


We now have Gillespie Borate available.

- Gillespie Borate was specifically developed as an alternative to Gerstley Borate and is very similar to the original Gerstley Borate in terms of composition and performance.
- The properties that make Gerstley Borate so popular in glaze recipes, such as providing boron and calcium and promoting a good melt, are also present in Gillespie Borate.
- An important advantage is that Gillespie Borate can be substituted 1:1 in existing glaze recipes that use Gerstley Borate.
  In principle, you therefore do not need to adjust your recipe. Based on our experience so far, Gillespie Borate produces good and comparable results and is therefore a very suitable alternative to          Gerstley Borate, which is no longer available. 
- Compared to Gertsley Borate, Gillespie Borate produces an even brighter and more intense colour result.
- If your recipe still contains Gerstley Borate, you can simply replace it with the same amount of Gillespie Borate.

A glaze mixed with Gillespie Borate is slightly more fluid than a glaze mixed with Gerstley Borate when using the same amount of water. This is not a problem in itself. Gillespie Borate and Gerstley Borate can behave slightly differently in water, which means that the viscosity may vary, while the glaze composition and its performance as a substitute remain the same.

More important than the exact viscosity is that the glaze is thoroughly mixed and that a sufficient and even layer is applied to the piece. If desired, the amount of water can be adjusted slightly to achieve the desired viscosity.

With Raku, the most important thing is to achieve a good, even glaze layer. If the Gillespie version is somewhat more fluid, this does not have to be a problem. In fact, a slightly more fluid glaze can be easier to apply, as it flows more easily and distributes evenly over the surface.

Gillespie Borate, like Gerstley Borate, contains boron and should be handled with the same level of caution when used as a dry powder. Avoid inhaling dust and use appropriate personal protective equipment when weighing and mixing. Once incorporated into a glaze, the risk associated with the dry raw material dust is of course no longer the same.