activePDF Toolkit Professional Edition
Copyright 2005, activePDF, Inc. All Rights Reserved.
Page 497 of 553
RM4SCC (Royal Mail 4-state Customer Code), UK Royal Mail
RoyalMail barcodes are height-modulated symbologies used for automated mail sorting and processing.
Detailed printing and placement requirements are available from the United Kingdom postal
RoyalMail can express the following 36 characters:
26 upper-case letters:
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y,
0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.
RoyalMail has the following structure:
RoyalMail barcodes consist of a continuous string of characters with no space characters encoded as
bars. The format has a density of 20 to 24 bars per 25.4 centimeters. Each bar can consist of
Ascenders, Trackers and Descender. If you divide the individual bar height into thirds, the ascenders
are the top third, the trackers are the middle and the descenders are the bottom. Each bar must
contain a tracker.
The start and stop bars use a special encoding, consisting of a tracker and ascender or a full bar. The
start and stop bars are unique, enabling the barcode to be read in any direction. Toolkit automatically
encodes the start and stop bars. The quiet zone must be at least 2mm before the start bar and after
the stop bar.
Toolkit automatically calculates and applies the checkdigit. Toolkit generates RoyalMail barcodes
according to the standard requirements. By default, Toolkit displays the human readable text. You will
need to set ShowHRText equal to false to comply with the standard requirements.