Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Year 2 Clinical Studies and Dispensing > Frame Materials > Flashcards

Frame Materials Flashcards

1
Q

What are the two types of plastic used for frames?

A

Thermoplastic
Thermosetting

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What temperature does cellulose acetate soften at?

A

57 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the features of a cellulose acetate frame?

A

Easy to adjust
Fully reinforced sides

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the flash point of cellulose nitrate?

A

70 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the disadvantages of cellulose nitrate?

A

Low flash point
Becomes brittle and yellows with age

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the features of Optyl?

A

15mm of sides reinforced or full reinforcement or metal sides
Lightweight
Hypoallergenic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What temperature does Optyl soften at?

A

88 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the features of SPX?

A

Sides always reinforced
Flexible
Lightweight
Hypoallergenic
Shrinks if overheated
SPX stamped on frame
Impact resistant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What temperature should SPX be adjusted at?

A

95 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the characteristics of Silicone-based rubber?

A

Highly durable
Soft and pliable
No hinges or metal elements
Lightweight
Solid colour
Can use additional strap

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How is gold added to a base metal on a frame?

A

Welding or plated via electrolysis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What base metals are used for gold frames?

A

Nickel silver
Bronze

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are the advantages of a gold frame?

A

Colour keeps well
Resistant to corrosion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the features of Nickel Silver?

A

Fairly corrosion resistant
Easily adjusted
Flexible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How can allergies to Nickel Silver be overcome?

A

Plastic Tips and bridges
Inert coatings

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the components of Nickel Silver?

A

20% Nickel
Mostly Copper
No Silver

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

How is colour applied to Nickel Silver?

A

Electroplating or lacquering

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What are the features of Stainless Steel?

A

Lightweight
Corrosion resistant
Rigid but flexible
Hypoallergenic (if pure)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

How is colour applied to Stainless Steel?

A

Electroplating

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What are the features of Titanium?

A

40% lighter than other metals
Flexible
Corrosion and abrasion resistant
Hypoallergenic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What are the components of Titanium?

A

If pure: 98% titanium
If beta: 80% titanium, other metals (aluminium, iron, tin) and titanium alloys (nickel and cobalt)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What are the characteristics of Memory metals?

A

Return to their original shape after extreme distortion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What are memory metals made from?

A

Nickel-titanium
Can be other alloys but normally contain nickel or titanium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What are some other more recent materials?

A

TR90 Nylon - lightweight, flexible, v durable, thermoplastic
Wood/Faux wood - good shock absorber
Recycled materials - e.g. acetate
3D printed - castor beans or polyamide, not fully biodegradable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
How is colour applied to cellulose acetate frames?
Colour extruded (same colour throughout) Laminated (2-tone) Dyed (see through)
26
How are cellulose acetate frames made?
Made from blocks of acetate sliced into sheets and routed
27
How are the joints attached in cellulose acetate frames?
Heat inserted Screwed Pinned
28
How are cellulose nitrate frames made?
Made from blocks of nitrate sliced into sheets and routed
29
How are the joints attached in cellulose nitrate frames?
Pinned
30
How is colour applied to cellulose nitrate frames?
Laminated
31
What are the features of cellulose nitrate?
Becomes brittle and yellow with age
32
How are cellulose propionate frames made?
Injection moulded
33
How are the joints attached in cellulose propionate frames?
Inserted during manufacture
34
How is colour applied to cellulose propionate frames?
Dyed Lacquered
35
What are the features of cellulose propionate?
Lightweight Flexible Hypoallergenic CP often stamped on frame
36
What temperature should cellulose propionate be adjusted at?
70 degrees
37
How is SPX manufactured?
Co-polyamide injection moulded
38
How are the joints attached to SPX frames?
Inserted during manufacture
39
How is colour applied to SPX frames?
Dyed Lacquered
40
How are Optyl frames manufactured?
Epoxy resin injection moulded
41
How are Optyl frames joints attached?
Screwed Inserted during manufacture
42
How is colour applied to Optyl frames?
Dyed Lacquered
43
How are carbon fibre frames manufactured?
Injection moulded, metal front attached
44
How are carbon fibre joints attached?
Pinned
45
How is colour applied to carbon fibre frames?
Lacquered to metal front Plated to sides
46
What are the features of carbon fibre frames?
Sides not reinforced Cold glaze Lightweight Strong Hypoallergenic Not flexible
47
How are acrylic frames manufactured?
Routed
48
How are acrylic frames joints attached?
Pinned
49
What temperature should acrylic frames be adjusted at?
70 degrees
50
How is colour applied to acrylic frames?
Front: laminated Sides: dyed
51
What are some features of acrylic frames?
Usually cat eye supra style Brittle Sides not reinforced
52
How are tortoiseshell frames made?
Natural tortoiseshell
53
How are joints attached to tortoiseshell frames?
Pinned
54
How can tortoiseshell frames be adjusted?
Steam Splice with other tortoiseshell
55
What are some features of tortoiseshell frames?
Hold their shape Stable
56
What is a feature of gold frames?
Hallmarked
57
How are Nickel silver frames manufactured and joints attached?
Soldering
58
How are Stainless steel frames manufactured and joints attached?
Welding
59
How are Titanium frames manufactured and joints attached?
Cut and pressed, then laser soldered
60
How is colour applied to titanium frames?
Galvanised Ion plated
61
How are aluminium frames manufactured?
Welded All parts of the frame are cut from one piece of metal
62
How are joints attached to aluminium frames?
Welded Riveted
63
How is colour applied to aluminium frames?
Anodised Coated
64
What are some features of aluminium frames?
Lightweight Rigid Cold to touch Difficult to adjust
65
How are plated metal frames manufactured and joints attached?
Soldered
66
How is colour applied to plated metal frames?
Electroplated Lacquered
67
What are some features of plated metal frames?
Cheap Tarnish easily Malleable

Year 2 Clinical Studies and Dispensing (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions