Xiem Flexible Ruler, 16" Laguna Clays Copper carbonate is a green

Copper carbonate is a green powder that is used primarily as a glaze or slip colorant

and colored with organic dyes to simulate the fired color

In oxidation firings

Fires gray/white in reduction and lighter in oxidation

but fires to a nice yellow color at cone 10

Xiem Flexible Ruler, 16" Laguna Clays Copper carbonate is a greenTake accurate measurements on curved surfaces, draw straight lines on slopes the Xiem Flexible Ruler is adjustable for all of your shape making and designing needs. With calibrations for both inches and millimeters on either side, the Flexible Ruler is perfect for any hand building or wheel throwing application where lines are hard to measure.