Please let me know if these sounds like a good idea. (1)I made this dragon he's in greenware stage I'm thinking of spraying him with greens & blues. When he gets out of the kiln put the shading & details in. (2) I have trays with flowers & details in underglaze I'm thinking of spraying them with clear glaze for a shine & protection too.
Thank you in advance <3

Views: 269

Reply to This

Replies to This Discussion

I'm not sure what you gain by spraying (underglaze?) on greenware, rather than waiting until after bisque. You can layer underglazes on bisque with very little bleed through of one color into the next. I would think bisque first, spray base underglaze colors, then hand paint details in underglazes, followed with clear satin or matte glaze for the body, and gloss for eyes, teeth, and claws. Substituting glazes for underglazes in this scenario would be asking for trouble as your details would likely dissolve into the base coat (green and blue) glazes.

Clear glaze over underglazes intensifies color and allows thorough cleaning that is impossible on a grainy underglaze only surface.

I've found firing under-glazed ware to bisque temperature, before applying cone 6 glazes, reduces the blurring of the under-glaze lines during the cone 6 firing.

Seeing stuff move through our kiln, I've seen the quicker approach of applying under-glaze to greenware often causing cracking in the bisque firing if the under-glaze is applied to dry rather than wet ware. But I've not seen this problem develop when underglaze applied to damp or wet greenware.

George Lewter said:

I'm not sure what you gain by spraying (underglaze?) on greenware, rather than waiting until after bisque. You can layer underglazes on bisque with very little bleed through of one color into the next. I would think bisque first, spray base underglaze colors, then hand paint details in underglazes, followed with clear satin or matte glaze for the body, and gloss for eyes, teeth, and claws. Substituting glazes for underglazes in this scenario would be asking for trouble as your details would likely dissolve into the base coat (green and blue) glazes.

Clear glaze over underglazes intensifies color and allows thorough cleaning that is impossible on a grainy underglaze only surface.

I'm sorry, I didn't say that the blues & greens were under glaze. I am trying to do single firering. I guess with somethings it's not workable. Thank you so much:)

Raw glazing seems to work best on items with a pretty consistent thickness of around 3/16 inch or more. Thinner pieces (or very thin varying to thicker) tend to crack from uneven expansion as they absorb the water from the glaze. The thinner, more fragile areas get relatively more saturated with water than do the thick areas, expand more, causing stress and cracks. It often happens very quickly after glazing, and is more apt to happen with dipping than when spraying. 

If you spray and brush judiciously. Dry very thoroughly. Pre-heat and do your low end heating ramps slowly your proposed method could very well work just fine. To me, the labor going into sculptural work justifies more conservative firing technique (bisque).

Reply to Discussion

RSS

Videos

  • Add Videos
  • View All

Use These Links to Support Us

Low cost flat lapping disc can be used on you potters wheel if you, drill bat pin holes in it, and provide a trickle of water to cool it. At amazon.com, 120 grit for aggressive material removal. Click the image to purchase 

Members have had great things to say about John Britt's new book, Mid-Range Glazes. Click the image to buy from Amazon.com

Purchase Glazes Cone 6 by Michael Bailey, The Potters Book of Glaze Recipes by Emmanuel Cooper, or Making Marks by Robin Hopper, all available at amazon.comMastering Cone 6 Glazes by John Hesselberth & Ron Roy is now out of print.

Harbor Freight is a great place to find unbeatable prices for better HVLP spray guns with stainless steel parts and serviceable economy models, as well as detail guns, all tested by our members for spraying glazes, as well as compressors to power the guns. As yet no one has tested and commented on the remarkably inexpensive air brushes at harbor freight.

The critter siphon gun is a spray alternative that is well liked by some of our members, and is available at amazon.

Amazon is also a competitive source for photo light tents for shooting professional quality pictures of your work. They also have the EZ Cube brand favored by several of our members. You might also want to purchase the book Photographing Arts, Crafts and Collectibles . . .

If you are up to creating videos of your work or techniques you might want to invest in a flip video camera

Following are a few scales useful for potters. Ohaus Triple Pro Mechanical Triple Beam Balance, 2610g x 0.1g, with Tare $169.00

And finally a low cost clone of the OHaus. The Adam Equipment TBB2610T Triple Beam Mechanical Balance With Tare Beam $99.62

ebay is a great alternative for many tools and the equipment used in the ceramics studio - kilns, wheels, extruders, slab rollers are often listed there both new and used.

Tips for Members

If you just want to spout off, it is best accomplished as a blog posting. If you want to get more guidance and ideas from other members, ask a question as a new discussion topic. In the upper right corner of the lists for both types of posting, you will find an "+Add " button. Clicking it will open an editor where you create your posting. 4/16/2014

© 2024   Created by Andrea Wolf.   Powered by

Badges  |  Report an Issue  |  Terms of Service