Why the pink?

Two mugs. Different firing, but using the same schedule. The dry glazes are from the same batch, but they were mixed (with water) at different times. The mug on the left was sprayed the day after mixing. The mug on the right was sprayed several weeks after mixing.

The glazes are SCM Cool, Hanna's Blue Ash, Water Color Blue, Jenn's Juicy Fruit. Mayco Green Tea Inside and over the lip.

Here's another cup from the firing with a little more of the blue glaze.

Doesn't seem like it was the firing. This vase was sprayed at the same time as the mug on the right, but it was fired at the same time as the mug on the left and it looks like the mug on the right.

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