BS 4810:1980

National foreword
Cooperating organizations
Specification
Section one - Font E 13 B
1 Scope and field of application
2 Character configuration
3 Character spacing and alignment
4 Character skew
5 Character tolerances
6 Voids
7 Uniformity of ink film
8 Extraneous ink (magnetic)
9 Embossment (impression)
10 Signal level
11 Paper
12 Format
Figures
1 to 4 Stroke 0 (Zero) to Stroke 3 (Three)
5 to 8 Stroke 4 (Four) to Stroke 7 (Seven)
9 to 12 Stroke 8 (Eight) to Stroke 11 (Symbol 2)
13 & 14 Stroke 12 (Symbol 3) to Stroke 13 (Symbol 4)
15 Character design matrix
16 Distance between characters
17 Allowable variation in vertical alignment
18 Allowable character skew
19 Average edge
20 Average edge tolerance
21 Edge irregularity
22 Examples of single voids
23 Examples of rows and columns
24 Wave form as it appears on face of oscilloscope
25 Distance of right-hand character from right-
         hand reference edge
Annex
A Linear amplifier, peaks for calibrating
         characters, and signal level reference
Figures
26 Circuit diagram of a linear amplifier
27 Waveform peaks for signal level measurement
28 Illustration of secondary signal level
         reference document
Annex
B Equivalent metric-inch dimensions used in font
         E 13 B
Section two - Font CMC 7
13 Scope and field of application
14 Character configuration
15 Means of automatic sensing
16 Reference edges of documents
17 Print location
18 Clear band
19 Character spacing and alignment
20 Character definitions and tolerances
21 Extraneous ink (spots)
22 Voids
23 Segment end zones
24 Uniformity of ink
25 Embossment
26 Signal level
27 Paper
Symbols and abbreviations
Figures
29 Format of documents
30 Magnified view of part of a character
Introduction to the drawings of the printed characters
of font CMC 7
Figures
31 Digits: Font height 3,20 mm (Hf1)
32 Symbols: Font height 3,20 mm (Hf1)
33 Letters A to H: Font height 3,20 mm (Hf1)
34 Letters I to Q: Font height 3,20 mm (Hf1)
35 Letters R to Z: Font height 3,20 mm (Hf1)
36 Digits: Font height 3,00 mm (Hf2)
37 Symbols: Font height 3,00 mm (Hf2)
38 Letters A to H: Font height 3,00 mm (Hf2)
39 Letters I to Q: Font height 3,00 mm (Hf2)
40 Letters R to Z: Font height 3,00 mm (Hf2)
41 Digits: Font height 2,85 mm (Hf3)
42 Symbols: Font height 2,85 mm (Hf3)
43 Letters A to H: Font height 2,85 mm (Hf3)
44 Letters I to Q: Font height 2,85 mm (Hf3)
45 Letters R to Z: Font height 2,85 mm (Hf3)
46 Digits: Font height 2,70 mm (Hf4)
47 Symbols: Font height 2,70 mm (Hf4)
48 Letters A to H: Font height 2,70 mm (Hf4)
49 Letters I to Q: Font height 2,70 mm (Hf4)
50 Letters R to Z: Font height 2,70 mm (Hf4)
51 The complete set of font CMC 7 characters
Annexes
C Equivalent metric-inch dimensions used in font
         CMC 7
D Use of symbols

Specifies the shapes and dimensions of the characters of character sets E 13 B (10 digits and 4 symbols) and CMC 7 (10 digits, 26 capital letters and 5 symbols), various types of printing defects and other printing considerations, tolerances, requirements for signal level measurement.