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screen printing => Newbie => Topic started by: alldayscreens on April 03, 2019, 05:42:41 PM
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Hello there! I am a newbie in the printing process and as I want to know more about the printing side, I volunteered myself to be the reclaimer of screens...this job was handed to me easily, btw.
It's not been a big deal so far but I want to avoid this in the future. During the de-hazing step, I have had three screens split right down the middle and quite a few holes appear. It seems like the de-hazer is literally eating the screen. I'm told that this happens occasionally but not as often (30 screens reclaimed, 3 split, 4 holes)
Is there anything I can do to prevent this? I'm using the Ryonet brand dehazer, I have requested Easiway 701 (from reading these boards) to see if that will change as well.
Thank you!
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Sounds like you are using a caustic haze remover for serious haze - how long are you leaving it on?
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Yes this happens.
That crap is nasty..
We use rhino clean SW210. Non toxic, and dehires as good as those nasty ones for plastisol.
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I assume you are using the Sgreen Stuff?
That dehazer will not put a hole in a screen that was not already going to develop. It is no where near that strong. I have personally left it on screens for a few hours and had zero issues.
What typically happens in a situation like this, is you are adding pressure to weak areas of the screen when you go through the reclaim/degrease steps by rubbing on the screen.
A split down the middle is also typically a screen tension issue. Not anything to do with chemicals. Small holes happen all the time in our world during the screens travels around the print shop. How new were the screens that split and what mesh counts were they?
I personally have used the 701 for a few years, its a good product! Its going to give you the same results the Sgreen Stuff will give you.
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The only time I had screens pop down the middle like that was when I left it on too long. I took a call and forgot about them, it only took about 5 minutes. And yes, it can be nasty stuff...
Steve
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there are ink degraders, degreasers and dehazers. Which one are you using? Dehazing is for the most part not really necessary. In 10 years here we have never done it. . . What is the name and purpose of the actual product you are using?
pierre
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We use pink stuff here. It smells like bubblegum and gets rid of the stain as well as degreases.
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It istthis https://www.screenprinting.com/collections/screen-printing-chemicals/products/ryonet-industrial-haze-remover (https://www.screenprinting.com/collections/screen-printing-chemicals/products/ryonet-industrial-haze-remover) - smells like turpentine and I have huge rubber gloves to use it as it is pretty caustic. Th instructions say leave it on for up to 8 minutes, I've left it on for 5 and 8 minutes when the ripping happened. 5 minutes it what it took for the haze to come out as well, 4 minutes it didn't quite touch it. Scrub with a nice soft scrubby and let it sit.
The funny this is the rips happened while it was sitting on the screen, not while washing. I definitely think the screen were weak - they happened on the "oldest" screens, ones that have been used the most over a year. Mesh counts varied - one was a 110, one was a 160, one was a 230. I didn't measure the tension on them before they ripped, but I think they were on the lower side. The holes all happened in older 110s as well.
My printer also said that dehazing may be optional until there are "too many" ghosts in the screens that may block a little light. I've only done the dehazing step three times but each time it was an issue.
My screens are stacking up again, I've got the 701 to try out this week. Cross my fingers I don't pop another one
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Cleaning ASAP will reduce staining.
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It istthis https://www.screenprinting.com/collections/screen-printing-chemicals/products/ryonet-industrial-haze-remover (https://www.screenprinting.com/collections/screen-printing-chemicals/products/ryonet-industrial-haze-remover) - smells like turpentine and I have huge rubber gloves to use it as it is pretty caustic. Th instructions say leave it on for up to 8 minutes, I've left it on for 5 and 8 minutes when the ripping happened. 5 minutes it what it took for the haze to come out as well, 4 minutes it didn't quite touch it. Scrub with a nice soft scrubby and let it sit.
The funny this is the rips happened while it was sitting on the screen, not while washing. I definitely think the screen were weak - they happened on the "oldest" screens, ones that have been used the most over a year. Mesh counts varied - one was a 110, one was a 160, one was a 230. I didn't measure the tension on them before they ripped, but I think they were on the lower side. The holes all happened in older 110s as well.
My printer also said that dehazing may be optional until there are "too many" ghosts in the screens that may block a little light. I've only done the dehazing step three times but each time it was an issue.
My screens are stacking up again, I've got the 701 to try out this week. Cross my fingers I don't pop another one
You will love the 701!!!!
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You will love the 701!!!!
I do! Haven't split a screen in two months. ;D
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We use pink stuff here. It smells like bubblegum and gets rid of the stain as well as degreases.
Hate the pink stuff. So sudsy...
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Had it happen to me when I used to leave the Haze remover on for too long. I would mix some water if it's too strong.