Brother PT-9700PC - Manual (Page 38)

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ESC L 8-dot double-density bit image
[ASCII] ESC L n1 n2 data
[Decimal] 27 76 n1 n2 data
[Hexadecimal] 1B 4C n1 n2 data
[Parameters] 0≤n1≤255, 0≤n2≤255
The data contains image data that is n1 + n2 * 256 bytes.
[Description]
Specifies that an 8-dot double-density bit image will be printed with the number of dot
positions defined by n1 and n2.
・ Specify n1 and n2 in the same way as with ESC K.
・ First, the data is lined up in one row as shown below.
・ One dot of the image data is enlarged to 6 dots vertically by 3 dots horizontally.
・ As a result, the image becomes 48 dots vertically × (n1 + n2 * 256) * 3 dots horizontally.
1 byte 1 byte 1 byte 1 byte
…
1 byte 1 byte
n1+n2*256 byte
MSB
LSB