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Old 11-23-2005, 06:34 PM
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is it ok to mix reducers?

I've got a small amount of clear to put on can I mix ppg 870 and 860? I've got a little of each. temp will be about 65
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Old 11-23-2005, 07:03 PM
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Mixing 860 and 870 would not be a problem.
What to avoid would be mixing 860 and say 885 or 895.

Always best not to skip a grade of reducer when mixing.
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Old 11-23-2005, 07:14 PM
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thanks Barry
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Old 11-24-2005, 07:33 AM
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I know a few painters that use a mix of two temps when they are at the upper or lower range of a particular reducer in an effort to more accurately adjust for temp. I have never had an occasion to try this but maybe Barry or some of are other guru's could shed a little more light on this subject for us amature chemists out here.
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Old 11-24-2005, 09:04 AM
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Its a minor technicality however it can cause minor problems with some reducers.
Some of the companies just plain say never do it, others don't even address the question.

It all depends on the company that your spraying as to how they have formulated the different slows versus the fast.
Some companies it will make no difference but the PPG and SPI it will.

The simplest explanation I can give you is its like having a ladder and taking the three middle steps out. Its not a major problem but could cause some minor problems.

The above is more true with the better reducers and paint lines than the cheaper ones.
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Old 11-24-2005, 09:32 AM
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I wonder how small is small? At 65F, if I was painting a rear view mirror, for example, I would use straight 860. If I was painting a fender or a hood, I would use 870. Rarely would I find the need to mix them, one hypothetical would be painting several panels at a cool temp (58-60F) might need something a bit slower than 860 just to get around the job while ensuring overspray melt-in.
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