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DT > Materials assessment y10 > Flashcards

Materials assessment y10 Flashcards

1
Q

Physical properties

A

the traits a material has before it is used

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2
Q

absorbency

A

the ability to soak up moisture, light or heat, e.g. natural materials (such as cotton or paper) tend to be more absorbent than man made materials (acrylic or polystyrene)

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3
Q

density

A

how solid a material is. measured by dividing mass (grams) by volume (cm^3)

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4
Q

fusibility

A

the ability of a material to be heated and joined to another material when cooled, eg webbing is fusible and can be welded onto fabrics

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5
Q

electrical condutivity

A

the ability to conduct electricity, eg copper is a good conductor of electricity

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6
Q

thermal conductivity

A

the ability to conduct heat, eg steel is a good heat conductor

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7
Q

bleed proof paper physical properties

A

white, can be textured, thin

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8
Q

bleed proof paper working properties

A

coated to stop colour seeping, ink stays bright on the surface

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9
Q

cartridge paper physical properites

A

thick, textured, rough

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10
Q

cartridge paper working properties

A

expensive and opaque, used for ink and watercolour

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11
Q

textile categories

A

-natural fibres
-synthetic fibres
-blended and mixed fabrics
-woven fabrics
-non woven fabric
-knitted textiles

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12
Q

plant based natural fibres - cotton

A

cotton: white, fluffy, soft, absobent, cool to wear
-examples: shirt, underwear, denim

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13
Q

animal based natural fibres - wool

A

-wool: animal fibres are spun into yarn. easy to dye + available in many colours and textures. warm, crease resistant.
-examples: jumpers, coats, suits

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14
Q

animal based natural fibres - silk

A

-silk: very fine fibre from cocoon of the silk worm. readily takes dye. Soft, fine finish, gentle on skin, feels cool in summer and warm in winter, absorbent, strong when dry.
-examples: luxury clothing + bed sheets

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15
Q

synthetic fibres (crude oil) - polyester

A

-polyester: tough strong, hard wearing. Hold colour well, non absorbing so quick drying.
-examples: clothing, fleece garments, carpets

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16
Q

synthetic fibres (crude oil) - polymide

A

-polyamide (nylon) : versatile fabric, good strength, hardwearing, non-absorbent.
-examples: clothing, ropes, parachutes sports materials

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17
Q

synthetic fibres (crude oil) - elastane (LYCRA)

A

-elastane: stretchy, allows freedom of movement, quick drying.
-examples: sportswear, exercise clothing, swimwear, hoisery

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18
Q

Woven Textiles

A
  • yarns are woven together to form fabrics
    -the commonly used types are plain weave and twill weave
  • a loom weaves two threads - the warp and the weft - at right angles to each other
  • the self-finished edge is known as the selvedge, stops fabric from fraying.
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19
Q

Non-woven textiles

A
  • a sheet of web fibres are bonded thermally, chemically or mechanically. example: disposable face mask
20
Q

Non-woven textiles (felted fabric)

A

-felted fabric: Randomly matted fibres, often wool, available in many thicknesses and colours. Formed with moisture, heat and pressure, can be shaped as it has no elasticity or drape, used for hat making.

21
Q

Toughness

A

The ability to absorb energy through shock without fracturing

22
Q

Ductility

A

The ability to be stretched out or drawn into a strand without snapping.

23
Q

Elasticity

A

The bility to return to its original state afer being compressed or stretched.

24
Q

Strength

A

The ability of a material to withstand a force such as pressure, tension or shear.

25
Q

Hardness

A

The ability to resist abrasive wear and indentation through impact, Very hard materials can become brittle.

26
Q

Malleability

A

The ability to deform under pressure without cracking splitting or tearing.

27
Q

Grid Paper

A

Physical properties: White paper printed with a variety of grids, e.g. isometric, graph etc
Working properties: Lines are usually blue but can be darker to trace through

28
Q

Layout Paper

A

Physical properties: Smooth finish, off-white colour, translucent (see-through)
Working properties : Takes most media well

29
Q

Tracing Paper

A

Physical properties: Translucent (see-through), smooth
Working properties: Shiny, takes pencil well

30
Q

Corrugated card

A

Physical properties: Paper bonded to the outside
Working properties: Corrugations make it strong, protective and insulating; used in packaging

31
Q

Duplex board

A

Physical properties: Two layers of card bonded together
Working properties: Stiff, lightweight and printable for packaging

32
Q

Foil lined Board

A

Physical properties: White card with foil backing
Working properties: Stiff and oil resistant, foil backing reflects heat, used for food containers

33
Q

Foam core board

A

Physical properties: Smooth surface, laminated with white board
Working properties: Thick and rigid, available in a variety of thicknesses, prone to creasing and cracking, used for models and mounting photographs

34
Q

Inkjet card

A

Physical properties: Bright white and smooth on both sides
Working properties: Deep colours as the photographic ink sits on the surface

35
Q

Solid White Board

A

Physical properties: Smooth on both sides
Working properties; Stiff, can be cut or scored

36
Q

Hardwood

A

deciduous
-loses leaves in winter
-broad leaves
-grows very slowly

37
Q

Softwood

A

Coniferous
-needles and cones
-keeps leaves all year round

38
Q

Beech

A

Tool handles: it is more elastic and is very resistant

39
Q

Mahogany

A

Instruments: it an produce a very deep warm tone and wont break easily

40
Q

Oak

A

tables: durable, strong, and sturdy

41
Q

Balsa

A

model airplanes: lightweight, and also strong

42
Q

Pine

A

furniture: it offers a good deal of stiffness strength and shock resistance

43
Q

Larch

A

fence posts: it is stable and durable

44
Q

Spruce

A

furniture: affordable and quite cheap

45
Q

MDF

A

handles humididty better, strong doesn’t get damaged easily

46
Q

Plywood

A

Beams: high impact- strong

47
Q

DSB

A

flooring: cheap, durable

DT (1 decks)

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