When a recipe add up to 100% you can compare the recipes.
If the recipe does not equal 100% you can’t compare materials because the proportions don’t equalize. It is pretty easy to convert a recipe to equal 100%. The process of changing a recipe to equal 100% is called “normalization”.
To normalize a recipe:
- Take each ingredient weight and add them up.
2. Divide each of the material amounts by the number found in step number 1
3. multiply each number by 100
Ex:
Blue Chun Glaze – Cone 9-10
| G-200 Feldspar | 4210g |
| EPK | 180g |
| Flint | 2720g |
| Whiting | 900g |
| Gerstley Borate | 880g |
| Dolomite | 880g |
| Zinc Oxide | 170g |
| Tin Oxide | 260g |
10,200
Plus:
| Rutile | 400g |
Divide by the sum of all the main ingredients excluding the opacifier or colorants
| G-200 Feldspar | 4210/10,200=.4127 |
| EPK | 180/10,200=.017647 |
| Flint | 2720/10,200=.2666 |
| Whiting | 900/10,200=.08823529 |
| Gerstley Borate | 880/10,200=.08627 |
| Dolomite | 880/10,200=.08627 |
| Zinc Oxide | 170/10,200=.01666 |
| Tin Oxide | 260/10,200=.02549019 |
Plus:
| Rutile | 400/10,200=.03921568 |
Multiply by 100
| G-200 Feldspar | .4127*100=41.27 |
| EPK | .017647*100=1.76 |
| Flint | .2666*100=26.67 |
| Whiting | .08823529*100=8.82 |
| Gerstley Borate | .08627*100=8.63 |
| Dolomite | .08627*100=8.63 |
| Zinc Oxide | .01666*100=1.67 |
| Tin Oxide | .02549019*100=2.55 |
Plus:
| Rutile | .03921568*100=3.92 |
“Normalized” Recipe
| G-200 Feldspar | 41.27g |
| EPK | 1.76g |
| Flint | 26.67g |
| Whiting | 8.82g |
| Gerstley Borate | 8.63g |
| Dolomite | 8.63g |
| Zinc Oxide | 1.67g |
| Tin Oxide | 2.55g |
| Total | 100 |
Plus:
| Rutile | 3.92g |
