Potters & Sculptors - Making Rock from Mud
Does anyone have some advice for spraying glazes? I use a small airbrush to spray underglazes and of course, have great luck with them going on smoothly. I don't want to use my really good airbrush for my glazes though because I understand it is very hard on them due to the particle size, and of course I don't want to screen the glazes too finely because the particles give me the effects I'm looking for. I'm using a larger automotive spray gun I bought at Canadian Tire but it constantly plugs on me and sometimes won't even start spraying. I did brush my glazes on but really want a much smoother effect and I use a lot of different glazes in a small studio so don't have the space for more than a couple of them in big pails.
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Sorry George I was too quick with the post button and put this in the wrong place!
Harbor Freight has an HVLP Spray Gun that they had on sale for $14.99 last weekend. They are normally between $25-30. I usually stock up on them when they go on sale like this. It makes it nice when you are using multiple glazes as you don't have to clean out between each one. They also sell stands for them. They will clog if you have a glaze with illmenite or something like that, but they come with a wrench & a brush & are fairly easy to clean out & you can't beat the price!
I can spray several big pots without a single problem. The only time I have a problem is when I am doing macros that have illmenite in them. Also when I clean the guns out I will find a lot of RIO. I am using a 2 hp. compressor with mine. Got it on sale at Harbor Freight for $89.00 a year or 2 ago. Also make sure you use a regulator in line to keep the pressure under 60lbs. You also get a little bit of water with the compressed air, but since glazes have water in them, it's not a problem. You would need an in line dryer if you were spraying something that was sensitive to having water in it. These are great little guns & will last for quite a while if properly cared for. Jeff
Jeff, how fine a line can you do with this gun. I am looking for a gun that is sort of the "touch up" category, the airbrush is too finiky for me, and the Little Critter, which I like for general spraying is too wide a pattern. I am wanting to use Steven Hill's approach to oxide accents and need something between the 2 guns that I have.
Kathy, Something you might want to consider is getting a manifold and several short hoses, so that you don't need to do as much changing of sprayers and glaze cups, might help with the stress on your hands. I have found that nothing takes the place of spraying for certain effects, and once you get a spot sett up that suits you it will be much less daunting, I promise.
For glaze spraying, gravity fed hvlp guns have a definite advantage. Glaze is being supplied to the mixing chamber by gravity through a hole in the top of the gun that is about 3/8 inch in diameter. It takes a lot of settling out to clog that opening. Other guns siphon the glaze upward by negative pressure created by air passing rapidly over the top of a very small feed tube. The tubes are easily clogged by settling at the bottom of the tube. The outer two of the Harbor Freight guns shown below hold 20 onces which is enough to spray 3 or 4 large pots (over 12" x 12" tall)
|The gun above is specified for oil based paints, but several members have gotten good use with glazes||This detail sprayer is likewise designated for oil base paints but seems to hold up for small area glaze spraying||This model has stainless steel internal parts and costs about double the others. On sale for $40 it is still quite affordable.|