Another thread about wavy paper

[boatdreams]

I just searched the forums but didn't quite find my answer. I just started a run with a huge flood as the first color. The paper I am printing on (110 lb double thick Proterra cover) seems to have gotten rather wavy due the humidity. I haven't ever had any problems with this stuff, and I have pulled off some really tight registration on it.
However, today the stock was so wavy, I couldn't even fully clear the screen on this first flood. I had to stop printing after 9 or 10 pulls because half of them were bad.
I have all the paper on the rack right now with a dehumidifer and fan right nearby. My question is: Is this stock salvageable, or should I just count on having to use some new stuff?

Any thoughts, input, experiences, non sequiturs?

[SkatRadioh]

Sandwich it between two boards with weight on it for the day?

[squeegeethree]

Prerack next time. Sandwiching them may not work. You can print the back side with clear ink sometimes to counter act the wavy (or it might make the paper worse). Give it more time to dry and it may settle itself out.

[RADAR]

yes, prerack.

[andydiesel]

pre rack or if you can maybe try leaving them on the rack overnight, sometimes that will help flatten them out.

[farleypig]

i came up with this same issue last poster - very humid here when i printed them. totally sucked. Even had our garage A/C on the whole time.
have the next one coming up this week. Was told about this preracking idea at FS25 - my rack will only hold 100 single sheets, so is it ok to double up? Should I go ahead and keep the A/C off? having that running for 4 days cost a shitload and it really didn't do too much good other than keep me alive in the heat.

[squeegeethree]

I'm not sure if doubling up will work but whatever you do keep it consistent for all the paper.

[eyepeace]

Yes, put them under a thick board with some extra weight on top. That's what I remember reading in Andy's book.

i came up with this same issue last poster - very humid here when i printed them. totally sucked. Even had our garage A/C on the whole time.
have the next one coming up this week. Was told about this preracking idea at FS25 - my rack will only hold 100 single sheets, so is it ok to double up? Should I go ahead and keep the A/C off? having that running for 4 days cost a shitload and it really didn't do too much good other than keep me alive in the heat.

I actually don't pre-rack. I just take them out of all the packaging and leave them in a pile sitting out overnight. Sometimes with a board on top. I think they still adjust to the humidity, but the weight keeps them flat.

[andydiesel]

I'm not sure if doubling up will work but whatever you do keep it consistent for all the paper.

it actually does, we do it every now and then.

[Andymac]

If the wave is already in and they are completely dry, I would stack them and put a board and weight on them.

the preracking helps stabilize the paper to the in shop humidity. but that first big coat, sometimes it fucks it all up good. I just did a print on a half sheet (15x22) of arches aquarelle, when i cut it down they developed waves, then I printed a big flood (twice) it was hard to keep the corner flat because the wave wouldn't let the vacuum completely work.

they were so wet coming off, the paper actually sagged and developed little raised points where the wires crossed, almost like little dimples or dents.

It all went away after stacking in between and some more prints.

You have a vacuum, right?