Masonite board

In Activity 3.1, the students will prepare whiting compounds, substances that impart a brilliant white to a ground, which will be combined with other chemicals to produce a gesso paste. In Activity 3.2, the gesso paste will be applied to masonite board to prepare a... 

Apply the gesso to a masonite board (see item C). Cover the beaker with a watch glass. Store the gesso in a refrigerator between applications (it will gel between applications and should be warmed on a hot plate until it is just melted before using). 

C. Have students create a gesso ground by applying the gesso to a masonite board ... 

Using a utility knife, score one side of a 5-x-7-in. masonite board. 

The rabbit-skin glue or the cottage cheese provide adhesives to bind the whiting compounds into a thick, creamy solution that can be applied to a masonite board and built up layer by layer to form a solid ground. Calcium sulfate and calcium hydroxide dehydrate as the gesso dries and solidify to form a cement ground. They also provide a white solution that is made more brilliant with the addition of titanium dioxide. 

If a window is available, the fen can be mounted on a removable Masonite board. The Masonite should be attached to a lightweight wooden frame that fits over the window to block light. After a darkroom session, the complete Masonite board and light-tight fen can be removed and stored. 

Ketnath, A. (1978). The treatment of a fire-damaged picture painted on a masonite board. Studies in Conservation, 23, 168—173. 

PLASTIC OR MASONITE BOARD Fig. 12.7 AATCC rain tester. 

Commercial Masonite and Asplund boards and the asphalt-impregnated insulation board were sampled before any commercial heat treatment. The corresponding "thermomechanical" pulps had been produced by pressurized refining of steamed chips. The higher pre-steaming temperature used in the Masonite process resulted In a yield of about 85% as compared to a fiber yield of about 94% of the Asplund pulps, the remainder being dissolved. 

Figure 13 presents the Arrhenius plots for all boards of density between 850 and 1 100 kg/m. Here the hardboard line is the mean of both Asplund and Masonite type commercial hardboards, presented in more detail in Figure 14. There was no significant difference between hardboards from 2.3 to 6 mm thick made of the two related types of coarse thermomechanical pulp. Semi-hardboards...

Figure 13. Arrhenius plots and activation energy E for the initial maximum or plateau rate of heat release, versus the inverse absolute temperature. All data refer to high density boards. The hardboard line represents a mean for the commercial Masonite and Asplund hardboards of Figure 14, with a caliper varying between 2.2 and 6 mm. (Reproduced with permission from ref. 10. Copyright 1989 De Gruyter.)...

As noted above, hot asphalt may be supplied successfully to concrete. It may also be applied to properly prepared timber, masonite or other cement board, or any absorbent surface. Its bond to most plastics, as to steel, is erratic, and should not be depended upon. 

How to Use St icky t raps are simple affairs to mass produce at home. To make traps that will last several years, cut boards from V4" phivood. masonite, or a similar material and fasten them with staples or nails to garden stakes. You can also design them to hang from wire supports. Either way, make sure the traps are at average plant height. Traps made from cardboard or paper plates will work well in a greenhousef where they are protected from the elements. 

MEASURING BOARDi This Is wde from the 29-3/4 x 12 piece of wood. From the 36 (initially) steel etrlp two 12 pieces are cut and attaflush with the top umliig epoi glue. The whole board is attached to the clamp using masonite strips steel strips or mending plates. 

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