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Kindly suggest any method or solvent to re suspend silver from old dried out silver paint/paste. It's a 25 years old "Dotite©" D-550 bottle. Strangely there is no expiry date mentioned on the bottle.

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    $\begingroup$ Generally speaking, with difficulty. After 25 years perhaps it is time to get a new bottle? $\endgroup$
    – Jon Custer
    Jul 15 '17 at 14:12
  • $\begingroup$ A current advert (2spi.com/item/05003-ab) displays the jar labelled with expiry date. $\endgroup$
    – Buttonwood
    Jul 15 '17 at 16:31
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According to SPI Supplies:

If the Dotite Silver Paint dries out, unlike some other silver paints, it can be re-suspended with the addition of SPI #05004 Silver Paint Thinner followed by an ultrasonic bath treatment.

Generally, ketones are used as diluents, also for conductive paints (acetone, methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK)).

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