Riso giving spotty prints with all drums?

[rking15]

I am using a RP3700 that has been working fine, but now im getting spotty prints such as the photo attached. All the drums are behaving similarly, and they arent dried out. Is this a problem with the pressure rollers? IMG_3692.jpg

Thank you

David

[jermyth]

Re: Riso giving spotty prints with all drums?

It could be from the impression roller, but it kinda looks like under inked drum or dry drum spots. Are you making enough prints per master, 20 - 50?

[LA TECH]

Re: Riso giving spotty prints with all drums?

I would remove the pressure roller and scrapped off the ink on it, reinstalled it and run it, been there and done that and problem solved

[rking15]

Re: Riso giving spotty prints with all drums?

Thank you for the suggestions. Ive tried cleaning the pressure roller, and then completely replacing it.

I was still getting spotty prints.

I tried the same drum/master on a different machine with the same results. This clued me in that there might be a problem with the master maker.

Although the master maker imaging part looked clean, I wiped it down...and it completely fixed the issue. Hoping someone else can benefit from my trouble

[antone]

Re: Riso giving spotty prints with all drums?

Clean pressure rollers...make ROLLER isgood

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[Phil B.]

Re: Riso giving spotty prints with all drums?

i was going to say check the master maker.. but you did that and you have fixed the issue! Congrats