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I have recently bought Hotline Kiln Primer and followed instructions: that is to fire to 500 degrees F and hold for 10 minutes. My question is should I let the Primer dry completely before I fire or fire to dry?

I am having a problem with a haze on the bottom of 96 after firing at following schedule.

400 to 1000 hold for 10 mins
As fast as posible to 1220 hold for 10 mins
As fast as posible to 1450 hold for 18 mins
As fast as posible to 1000 hold for 10 mins
200 to 800 then let cool naturally

Val wrote:I have recently bought Hotline Kiln Primer and followed instructions: that is to fire to 500 degrees F and hold for 10 minutes. My question is should I let the Primer dry completely before I fire or fire to dry?

I am having a problem with a haze on the bottom of 96 after firing at following schedule.

400 to 1000 hold for 10 mins
As fast as posible to 1220 hold for 10 mins
As fast as posible to 1450 hold for 18 mins
As fast as posible to 1000 hold for 10 mins
200 to 800 then let cool naturally

is this the primo type or the hifire type? i have both - recently was playing with something and fired to 1550 on a shelf with the primo type and the back of the piece looks like it's devit'd - i use be and i ramped no faster than 400 dph in any part of my schedule...
D

Val wrote:I have recently bought Hotline Kiln Primer and followed instructions: that is to fire to 500 degrees F and hold for 10 minutes. My question is should I let the Primer dry completely before I fire or fire to dry?

I am having a problem with a haze on the bottom of 96 after firing at following schedule.

400 to 1000 hold for 10 mins
As fast as posible to 1220 hold for 10 mins
As fast as posible to 1450 hold for 18 mins
As fast as posible to 1000 hold for 10 mins
200 to 800 then let cool naturally

The reason you fire to 500 with a hold is to cure or dry the primer...so no need to dry first since that is the purpose of taking it up to 500.

When I get a haze from primer on glass it's usually because I fired too hot, or it's been fired more than once (that could apply to the primer or the glass actually)...that can cause the primer to stick to the glass too.

Dee,Cynthia,

Hotline is Primo. Tried one blank and it turned out beautifully but then tried the piece I really wanted to turn out well , and it had a haze. I soaked at 1450 for 3 mins longer.

Val

Val wrote:Dee,Cynthia,

Hotline is Primo. Tried one blank and it turned out beautifully but then tried the piece I really wanted to turn out well , and it had a haze. I soaked at 1450 for 3 mins longer.

Val

val, i have had some intermittent trouble with haze/muck on the back of my pieces when using primo - i have started to let it dry by itself rather than the prefire and have had less trouble but i use it primarily when i'm experimenting - i use their high fire for production shelves and clean it off...

i saw that they have a "new and improved" version of their primo, is that what yours is?

D

my experience with the primo primer was very similar. I got a lot of haze (primer sticking) even when I know I did not fire too high. I think it has to do with the powderness of the surface, its very...loose, unlike BE, which is a little more stable.

I ended up switching to be wash because no matter what adjustments I made to my schedule I always seemed to get the haze.

Thanks for all the input.
Primo is regular not new and improved.

I think I will avoid primo in future, though I fired again last night and got beautiful results. I can't rely on it though.

Val wrote:Thanks for all the input.
Primo is regular not new and improved.

I think I will avoid primo in future, though I fired again last night and got beautiful results. I can't rely on it though.

good idea - cause i sometimes do lots of testing and prototyping i like to keep 2shelves coated with it for quick turnaround but for production i use the regular hotline hifire...
D