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  1. #1
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    dishwasher safe mugs and testing

    I am trying out different suppliers mugs that are dishwasher safe.

    Now i have one mug where a small line has transferer from one mug to another, these were actualy touching and it was on the 11th wash @ 70c (finish tablets) that this happened.

    Before this everything seemed good.

    So questions :

    1. I take it they are not dishwasher safe or was it because they were touching, should it happen? Is it something else.
    2. What temp do you run tests for and for how many washes?

  2. #2
    Premium Member Tetris Champion, Space Invaders Champion, Asteroids Champion
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    It is because they are touching and getting hot.

    I had this recently on a run of mugs where I was pulling them out of a 5 at a time press, peeling and putting them to one side. Because i was doing a very long run they were being stacked and pushed together.

    I noticed a ghosting effect which it took me a while to work out.

    Dye sub ink is a gas style ink and basically particles from the just removed mug were transferring to the mug it was touching.

    Needless to say this was an easy fix, but not so for end users and their dishwashers.

    As far as testing, never done it. Always sent them out and hid behind a fence waiting for the first customer to come back to complain

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    We are new to the mug press so all the mugs we tested on an till we got it right we use at home, they all go in dishwasher and they are always touching but no transfer of colours on any of them.

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    Senior Member mrs maggot's Avatar
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    there was a big was test done before on here by another member, might be worth having a trawl through and comparing results.
    [h=A dictionary is the only place where success comes before work]5[/h]Laura
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    Senior Member WorthDoingRight's Avatar
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    Well, I buy dishwasher safe mugs and then pray the end user hand washes them lol

    But seriously if you buy from a reputable supplier you would expect them to be safe. However it is also the ink that plays a role and the dishwasher detergent used.

    I use a powder based detergent in my machine, it smells like neat bleach but is cheap and works brilliantly in cleaning items. I tend to find that if i wash non-dishwasher safe mugs it is the coating that comes off before the image.
    If a jobs worth doing it has to be Worth Doing Right


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    Its sawgrass inks, ricoh and trupix so shouldnt be ink or printing. Must be mugs then. these were of fleabay anyway and not up to much realy.
    Just wondered for future reference.

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    Senior Member logobear's Avatar
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    the mug coating is the critical part .....
    nothing should sub out at only 70c
    1 Hour T-shirt printing shop in Newcastle upon Tyne.

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    Logobear t-shirt print and embroidery. 74 Clayton Street. Newcastle. NE1 5PG. UK

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    My first test mug, printed with Sawgrass inks, Ricoh printer and ST110 mug press, came out a bit burnt as I found out that the press wasn't calibrated correctly - indicated 180 was actually 230.

    That aside, I bunged said test mug in the dishwasher and so far it has completed 46 70 degree washes whout apparent degradation from the original.

    What I did find was that a second mug that touched a glass did show signs of erosion at the point of contact but discovered that was possibly due to them moving with vibration as the machine cycled.

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