File:Constructive work; (1905) (14757045846).jpg

Identifier: constructivework00wors (find matches)
Title: Constructive work;
Year: 1905 (1900s)
Authors: Worst, Edward F. (Edward Francis), 1866-1949 Barber, Harriette, (from old catalog) joint author Seymour, Marian, (from old catalog) joint author
Subjects: Manual training Paper work Basket making. (from old catalog)
Publisher: Chicago, A. W. Mumford and company
Contributing Library: The Library of Congress
Digitizing Sponsor: Sloan Foundation

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Text Appearing Before Image:
FIGURE XXV.
If the shape turned upon the wheel has rounded sides the
mold must be made of two or three pieces, and the manner
of making such a mold is quite different from that of the
one piece mold. The linoleum is placed and the plaster
poured the same as when making a one piece mold.
Fig.XXIV.
In making a two piece mold after the shape has been cut
out, (See left of Fig. XXIII), of plaster it is taken off.
239
Usually hammer and chisel are used in cutting it loose from
the disk. The disk is smoothed and the form inverted as
shown in the left of Fig. XXV.
In placing the inverted form
care should be taken that it is exactly in the center of the
disk. A pencil mark is made at the place where the cir-
cumference is greatest. This is done while the disk is re-
volving.
After the form is thoroughly doped a cylinder of linoleum
is placed around the form as shown in center of Fig. XXV,
and liquid plaster is poured in to the height shown by the
Text Appearing After Image:
FIGURE XXVI.
pencil mark. When this part of the mold has sufficiently
dried the upper part is smoothed and a groove is cut into it.
See right of Fig. XXV. This groove is doped and the
linoleum is again placed as before and enough plaster is
poured in to cover that part of the form not covered by
the first pouring. (See on wheel in left of Fig. XXVI.)
In about half an hour the entire mold is ready to be re-
moved from the wheel. The mold parts at the place the
240
groove was cut or the place the greatest circumference was
marked and the form falls out. Sec center of Fig. XXVI.
After the mold has thoroughly dried as in the one piece it
is ready for use but cannot be used until the slip is made.
Making Slip.
Slip may be made of any kind of clay that will bear fire.
Allow the clay to thoroughly dry. Break into small piecse
and place in a barrel churn with water enough to cover
well. Allow the clay to soak a short time and then churn
well for about one half hour after which it is in a condition
to be strained through a fine sieve.

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