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Using Limit Formula Graphs
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There are two graphs available to display the formula values of a loaded recipe over limit formula information. The Limits Graph and the Al Si Graph are designed to assist you with:

  • assessing the melt characteristics of a glaze at given temperatures
  • making changes to a glaze using limit formula guide lines
  • making material substitutions so that the new recipe conforms to the original formula

Both the Limits Graph and the Al Si Graph displays respond automatically to changes made to recipes in either recipe panels.

The Limits Graph

When a recipe is being entered or is loaded into a recipe panel, click the button in the tool bar to open the Limits Graph window. (Fig.1)

Fig.1 The Limit Formula Graph set to C.10 showing the unity formula for the Cone 10 Glaze

This graph uses horizontal bars (gray and blue) to display oxide limits for the set temperature. The graph is generated from limit formulae data stored in a series of files kept in a folder called Limits. There are a number of these tables offered. You can change the set of limits used by clicking on the Load New Limits item in the Action menu of the Limits Graph window.

If you are aiming to create a recipe which matches the formula of another the limits graph will display the formulae of two recipes at once See Changing A Recipe

The Alumina Silica (AlSi) Graph

This graph is designed to display only Al2O3 and SiO2 unity formula values. The graph contains a blue rectangle which indicates the minimum and maximum values for Al2O3 and SiO2 given in the limit tables for the set temperature. This rectangle is another way of representing the blue bars in the Limits Graph (Fig.1)

A indicates the Al2O3 and SiO2 formula values of the recipe in the R.1 panel. If a recipe is also loaded in the R.2 recipe panel then a indicates the Al2O3 and SiO2 values for that glaze.

Fig.2 The Al2O3 SiO2 Limits Graph set to C.10 with the Al2O3 and SiO2 values for the Cone 10 Glaze located.

The Al Si Graph will display a second limits indicator in the form of a dark blue rectangle (Fig.3)

Fig.3 The Al2O3 SiO2 Limits Graph displaying a second limits rectangle

In this example the second limits rectangle has been displayed and its temperature setting has been changed to C.6

A setting such as this might be used to guide in making changes to e.g. the Cone 10 Glaze such that it might melt adequately at Cone 6.

Limits graphs can also display formula information for all of the recipes in a recipe database. Other graphs can be generated to display formula data for recipes in a blend.

Follow these links for more information about:


Recipe to Formula
Overview | Entering a New Recipe | Clearing Displayed Recipe Data | Saving as Individual file | Saving to a database | Saving a Glaze Picture | Saving a Recipe Text File | Deleting a Recipe From Your Hard Drive | Formula Calculations | Loading an Individual Recipe | Loading a Database Recipe | Changing a Recipe | Monitoring Calculations on a chart | Viewing Raw Material Information | Using Limit Formula Graphs | Viewing Database Recipes on a Limits Graph | Printing a Displayed Recipe | Sending Recipe Data to Other Environments | Creating Batch Recipes and Calculating Costs