Instructions for Use and Care of your Heavy Duty Soap Molds
Casting Temperature: Our soap molds have been successfully tested with glycerin
temperatures of up to 180°F with the HIPS & ABS, and 170°F with the Vivak, without
warping. However, it is recommended to pour the soap base at least 10-20°F lower
than these temperatures, or as low as possible, which will increase the mold’s
working life.
Tip: To avoid warping, it is important when casting M&P glycerin into plastic molds,
to use a thermometer to ensure that your soap temperature is below the maximum
recommended casting temperature and decreasing.
Pouring & Unmolding: Our one-part molds are designed to cast your soap at any
depth, up to the maximum stated weight. This versatility allows you to pour
whatever weight of bar you need at the time.
The techniques we recommend for filling and unmolding our one-part molds is to pour
the cast almost full leaving approx. 1/8"-1/4" of space at the top. When the soap
is ready to release, place the mold on a flat surface with the cavities facing down,
and press down steadily with the palm of your hand on the center of the top of the
cavities until the soap unmolds.
Tip: Some soap bases shrink less than others as they cool or saponify within the
molds. To easily unmold the bases, which shrink very little, you may need to pull
the edges of the mold outwards to manually break the seal that the soap may have on
the mold. When the seal is successfully broken, repeat the unmolding technique
above. To further aid in release, you may also lightly rap the mold squarely
against a flat surface with the cavities facing down, until the cast is free from
the mold. Always avoid excessive force when unmolding your soap. If the soap will
not unmold easily, it is recommended to keep waiting. In time, most soap will
shrink and unmold easily.
Unmolding Times for M&P Glycerin in our One-Part Molds: M&P glycerin's unmolding
times vary greatly from one base to another. Some will unmold easily at 4 hours,
others require several days at room temperature. It is generally recommended to
leave the soap in the mold for approx. 12-24 hrs. prior to unmolding it at room
temperature. If the M&P glycerin will not unmold easily within this timeframe, it
is recommended to keep waiting, checking it periodically until it does release
easily. To accelerate the unmolding process, please see the tips above, or the
chilling technique below.
Chilling M&P Glycerin: An unmolding technique we highly recommend is to chill the
M&P glycerin to 55-60°F prior to unmolding. This temperature can be achieved by
placing the room temperature glycerin into the freezer for approx. 15 minutes, or
into the refrigerator for approx. 1 hour. Chilling the M&P glycerin within the
molds will greatly aid in the release of the soap, and in a fraction of the time of
unmolding at room temperature. The process we recommend for using this technique is
to pour the glycerin into the molds, let stand at room temperature for 4 hours,
chill to 55-60°F with 15 minutes in the freezer or 1 hour in the refrigerator, then
unmold and let the casts set until the glycerin adjusts back to room temperature
before handling. Please note: It is not recommended to allow the glycerin's
temperature to drop below 55-60°F or to freeze when using this chilling technique,
as the glycerin will sweat as a result.
Unmolding Times for Hot & Cold Processed Soap in our One-Part Molds: It
is recommended to let the soap stay in the molds for as long as necessary (usually
18-24 hrs. for CP, but even several days if necessary), until the soap has
sufficiently solidified. Unmold the soap using the methods mentioned above. If the
soap sticks to the mold, using a mold release may aid in the release of these types
of soap.
Cleaning the Molds: Usually rinsing the molds in warm water is all that is
necessary. You may also wash the molds in warm soapy water, if necessary, to remove
any leftover oils and/or soap residue.