DRY MOUNTING TISSUE

Discussion in 'Darkroom Developing and Printing' started by Ponybet, Feb 20, 2004.

  1. Ponybet

    Ponybet Guest

    Can someone tell me what dry mounting tissue is for and why?
     
    Ponybet, Feb 20, 2004
    #1
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  2. Ponybet

    Mark A Guest

    It is used in a dry mount press. The tissue turns to a glue like substance
    that melts when heated in the press.

    The tissue is tacked (glued on a few places with a tacking iron) to the
    bottom of the print in the center. The edge of the tissue is tacked on to
    the mounting board. Then they are placed in a dry mount press heated to
    about 225 F for a few minutes. When removed, the print is attached to the
    mount board.
     
    Mark A, Feb 20, 2004
    #2
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  3. Ponybet

    Msherck Guest

    Can someone tell me what dry mounting tissue is for and why?

    Dry mount tissue is heat-activated adhesive impregnated into a thin porous
    substrate. It is used to mount photographs or other flat things onto some type
    of backing -- mount board, wood, etc. Heat from a dry mount press or iron
    melts the adhesive, which re-solidifies when it cools.

    Hope this helps.

    mjs
    <<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>
    C program run. C program crash. C programmer quit.
    <<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>
     
    Msherck, Feb 21, 2004
    #3
  4. why?

    See: http://www.lightimpressionsdirect.com/ for more on the
    tissue and dry mounting presses.
    Dry mounting tissue is a thermosetting adhesive. It is
    placed between the print and the mount and heated with
    either a special press or it can be done with a flat iron.
    I've posted a set of instructions for dry mounting to this
    group in the distant past, a Google search should find it.
    Dry mounting results in a perfectly flat and smooth
    mounting which will not peel due to moisture or heat. The
    adhesive seals the back of the print which can be an
    advantage in protecting it from poor mounting materials.
    Dry mounting is not recommended conservationists and is
    not desirable by gallery owners because it is difficult to
    remove a print for treatment or if the mount becomes
    damaged. It shuold be understood that the mounting itself
    does not damage the prints but, as indicated above, actually
    helps protect them. So, if your main consern is appearance
    of displayed prints, there is no method superior to dry
    mounting (IMHO). If you are making prints for sale you will
    probably want to use a temporary mounting such as archival
    photo-corners or archival hinge tape. Light Impressions
    makes all. Even when dry mounting is not contimplated a dry
    mounting press does an exceptionally good job of flattening
    fiber base prints.
    There is also a cold mounting tissue. This is a pressure
    sensitive adhesive used with a special roller press. It has
    the advantage of not requiring heat but has pretty much the
    same problems with difficult removal as dry mounting tissue
    so is also not very acceptable to the collector's trade.
     
    Richard Knoppow, Feb 22, 2004
    #4
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