Machine Coated
- paper or board, which is pigment coated at the end of
the paper or board-making machine.
Machine Direction
- the direction of a sheet or web of paper corresponding
with the direction of the flow of 'stuff' on the paper
machine.
Machine Finished (MF)
- Any finish obtained on a papermaking machine. It can
refer to either the finish on the sheet as it leaves the
last drying cylinder of the machine, or the finish given
to a sheet by Calendering online.
Machine Glazed (MG)
- paper which is dried on the papermaking machine by a
very large cylinder with a polished surface. The paper
has a smooth and a rough side. MG papers are used for
wrapping papers and posters.
Machine Stack
- a set of steel rollers at the end of a paper machine
between which the paper is passed to give it a smooth
surface.
Manilla
- originally paper made from pulp produced partly or entirely
of manilla hemp, but now mostly composed of softwood kraft
pulp. Most commonly used for envelopes.
Matt Paper -
coated paper with a dull, smooth finish.
Mechanical Pulp
- pulp made by the grinding of steamed or boiled groundwood
(without the addition of chemical agents).
Melamine Formaldehyde Resin
- a polymer produced by reacting melamine with formaldehyde;
wet strengthening agent.
Micrometer
- an instrument for measuring small distances accurately,
e.g. the thickness of paper.
Microperf
- very finely cut perforated edge, designed to simulate
the effect of a guillotine cut edge.
Middles
- layer of a board situated between the two external layers
or between an underliner and the back layer.
Mottled
- a variegated effect produced by the mixture of differently
dyed fibres or a drip of colour on the wet pulp. When
deliberately produced can also be known as 'granite' or
'silurian' effect.
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