Dremel 876 Specifications download pdf (Page 23)

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Problems & Solutions

Pinholes in glaze.

a. Primarily caused by underfired

bisque. Can also be underfired glaze

or a combination of the two firings.

b. Improper glaze application.

a. Fire bisque to shelf cone 04 or

hotter and at a slower ramping

temperature. Fire glaze to shelf

cone 06. Ware needs a two cone

difference in bisque and glaze

firings.

b. Try "Polishing" the dry glaze with

the heel of your hand before

firing. Sometimes pieces can be

saved by reglazing and refiring.

Colored glaze is streaky.

a. Not enough coats applied; coats

brushed on instead of "flowed" on.

b. Color not stirred.

c. Coats not applied at right angles to

each other.

a. Apply the proper coats per label

instructions using an Oval Mop

brush. Flow the glaze on evenly.

b. Shake and stir the glaze before use.

c. Apply the coats at right angles to

one another, allowing adequate

drying time between coats.

Sometimes the piece can be saved

by warming the piece; reglazing

with a heavy coat and re-firing.

Craters, Fisheyes, Bubbles, or large

pinholes appear in fired glaze.

Caused by gases escaping of during

firing.

a. Underfired bisque.

b. Firing glaze while it is wet.

c. Piece not fired hot enough or piece

was fired or cooled too fast.

a. Make sure bisque is fired to shelf

cone 04 or hotter. A two cone

difference between bisque and glaze

is required.

b. Allow glazes to dry 24 hours prior to

firing.

c. Fire glazes to shelf cone 06 or

recommended cone. Glazes need an

even steady ramping of temperature

and cooling as well. Check firing

section. File down craters and

reglaze, refire.

Problem Cause Solution

Clear glaze has green or yellow tint

in bottom of bowl, plate, pitcher etc.

Clear glaze was applied too thick. Generally brushing clear glaze needs

only 2 coats. If glaze is rolled inside,

thin the glaze slightly and then invert

the piece upside down to drain excess.

No correction once fired.

Glaze blisters or bare spots appear on

embossed pieces.

a. Air pockets in glaze where it meets

the bisque when applying the glaze.

b. Grease spots from body oils.

a. Use a flat glaze brush when applying

the glaze to embossed ware.

b. Clean hands before glazing and wipe

down piece with a damp sponge

before glazing. Touch up bare spots

with glaze and refire. File down

blister; reglaze and refire.

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