investment

investment

See figs. 5, 13, 557, 558.

The term can refer to the used in the process or to the material used to make that mold. It also denotes the process of coating or embedding the wax in this material and is applicable to clay-based, plaster-based, and ceramic shell molds. In all of these, the first layers have a special, fine consistency that is designed to pick up the detail and avoid problems during casting; the later layers are coarser. Clay-based investment may also be referred to as “loam.” The investment is destroyed to free the case .

Sources

Cultural Heritage: , 35;

Art and Craft Textbook:

Translations

French: moule de potée

Terme réservé à la . Désigne la partie externe du , qui peut être à base de plâtre ou d’argile, notamment.

Note: La potée désigne le mélange argileux servant -à l’origine- à fabriquer le moule (, 327; , 216), mais peut aussi parfois désigner le moule réfractaire (, 375; , 274). En anglais, potée et moule de potée sont désignés par le même terme (investment).

Sources

Cultural Heritage: , 625;

Historical: , 44–46; , 2:436–43, entry « bronze terme de fonderie »; , 79–84

Art and Craft Textbooks: , 260; , 216

Alternate Translations

  • (Terme non univoque.)

    Sources: Copper Industry: ; Historical: , 329

  • moule de coulée

    Sources: Cultural Heritage: , 69; ; ; Historical: , 6; Art and Craft Textbook:

  • potée

    Art and Craft Textbooks: , 375; , 274

German: Formmantel

Source

, 554

Alternate Translation

  • Gussmantel

    Source: , 706

Italian: forma

The variety of terms is due to regional differences in foundry terminology. Forma is the total of all layers of investments ready to cast. Camicia or tunica are the first fine refractory clay layer applied directly on the wax. Mantello or cappa are the second, coarser layer, often made of refractory clay, thick cloths, or iron belts to help contain the pressure developing during the . See .

Sources

, quaderni di restauro, vols. 1–3; , 193; , fols. 154v, 142v; , fols. 77v–78

Alternate Translations

  • camicia

    Literally “shirt”

    Source: , fol. 95

  • cappa

    Layer of the

  • chappa

    Early Tuscan spelling of cappa

    Source: , fol. 156v

  • mantello (di fusione)

    Used in the way defined here under the long entry “fusione” for the casting of bells under the paragraph “formatura” in Treccani

    Sources: , under mantello (di fusione); , 24; , 301

  • refrattario

    Refers to the investment material and investment mold

    Source: , 75

  • terra da forme

    Refers to the investment material

    Source: , fols. 76v, 80v

  • tunica

    Tonaca di terra, and even more often: involucro

    Source: , under tunica

Chinese: 熔模

Alternate Translations

  • 熔模材料

    Source: , 1214

  • 耐火材料

    Sources: , 1036; , 347