Ingredients

Ingredient Amount
Strontium Carbonate 27.81
Whiting 11.00
Ferro Frit 3110 16.68
EPK Kaolin 9.50
Silica 35.01
Add Amount
Red Iron Oxide 0.50

Instructions

Published in "Exploring Glazes: From Perfect fit to Crackle and Matte," in the March 2016 issue of Ceramics Monthly.

The image shown here has multiple glazes on it, including #24 Crackle Clear (Currie Strontium Series) with 0.5 % Red Iron Oxide added to it, which gives it a water blue color.
A bit of Iron seems to make it melt better.