Re: HP printer trouble

On Sun, 20 Apr 2025 08:09:39 -0700, John Robertson <jrr@flippers.com>
wrote:

On 2025-04-19 5:52 p.m., Jeff Liebermann wrote:

On Sun, 20 Apr 2025 01:38:50 +0200, "Carlos E.R."
<robin_listas@es.invalid> wrote:
 

On 2025-04-19 23:29, Jeff Liebermann wrote:

On Thu, 17 Apr 2025 22:11:20 +0100, Jeff Layman <Jeff@invalid.invalid>
wrote:
>

You could try that tonerbuzz tip of soaking the centre of a sheet of
paper with alcohol and running it a few times through the printer. No
disassembly required.

>
No.  Not alcohol.  What makes rubber useful is that it is ductile
(easily stretched without breaking or lowering in material strength).
If you "wash" rubber with alcohol, the oils that give rubber its
ductile nature will evaporate, cause the rubber to dry out, and
eventually make it hard as a rock.  Gasoline does the same thing to
fuel lines but takes years for the rubber to harden.
>
If you want to use chemistry instead of just replacing the part, I
suggest some made for the purpose:
<https://www.google.com/search?q=printer%20rubber%20roller%20restorer&udm=2>
For example:
<https://www.precisionroller.com/category/rubber-rejuvenators.htm>
I stuff I use is ancient and no longer sold.  It's 70% xylene (banned
in California) and 30% wintergreen oil (methyl salicylate).  The
xylene causes the pores in the rubber to enlarge.  The oil fills the
pores.  The xylene evaporates at a moderately fast rate, leaving the
oil behind inside the rubber roller.  As long as the rubber isn't
damaged or polished smooth, the rejuvenated rubber should last a few
years (not as long as new rubber).

>
If I search "Rubber Rejuvenators" in Amazon.es, I get products for the
car instead.
>
[...]
>
Got one, but it is "not available".
<https://www.amazon.es/dp/B0BL85QPZC>. It is the only one Google finds.
>
Got another, from the first link you posted, also not available:
<https://www.amazon.es/dp/B001AYVSCO>
>
>
Searching for the translated term in google instead "limpiador rodillo
de impresora"... finally, found something that does ship, although not
from Amazon:
>
<https://www.amazon.es/Ewent-EW5617-Pulverizador-Limpieza-Transparente/dp/B07FYT8CF4>
>
Gosh, handling and shipping is more expensive than the product itself.
I'll keep seeking.

 
Try again using the first search I listed above:
<https://www.google.com/search?q=printer%20rubber%20roller%20restorer&udm=2>
<https://www.ebay.com/sch/i.html?_nkw=printer%20rubber%20roller%20restorer>
I like to search by photos first because I usually recognize some of
the common products and can read the labels on the bottle or can.
 
Besides restorer, also try rejuvenator, renewer, revitalizer, cleaner
and softener.
 

>
Rubber Renue by MG Chemicals:
https://mgchemicals.com/products/electronics-maintenance/specialized-cleaners/rubber-renue/
Wintergreen Oil is the same thing, just not so easily found.

I beg to differ.  Wintergreen Oil is commonly available, but under a
variety of names:
<https://www.ebay.com/sch/i.html?_nkw=wintergreen%20oil>
In retail stores, Wintergreen Oil (or Oil of Wintergreen) usually
under beauty supplies.  Also try "methyl salicylate".  

<https://mgchemicals.com/downloads/msds/01%20English%20Can-USA%20SDS/sds-408c-l.pdf>
The MG Chemicals SDS safety sheet indicates that Rubber Renue is:
  27% methyl salicylate
  73% isopropyl alcohol
As I previously mumbled, I don't like using alcohol.  Alcohol works
fine to soften and clean NEW rubber.  It doesn't work at all with old
rubber that has hardened.  The idea is to expand the pores below the
rubber surface and fill the pores with oil.  Alcohol will not soften
rubber that has been hardened by exposure to oxygen.  I can't
recommend a softening process without first knowing the type of rubber
involved.  My best guess is silicone or urethane.

I still recommend ordering new replacement rollers.

John :-#)#

--
Jeff Liebermann                 jeffl@cruzio.com
PO Box 272      http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann      AE6KS    831-336-2558