FEBRUARY 6 2003
other surface pre-treatments shall be applied as recommended by the manufacturer.
18.104.22.168. Silk-screen inks, whether transparent or opaque shall be supplied by a
manufacturer with experience in production of such inks for the purposes and surfaces
22.214.171.124. No paint or ink shall be used that will fade, discolor or delaminate as a result of
exposure to ultraviolet light. All paints and inks shall be evenly applied, without pinholes,
scratches, peeling, or application marks.
12.21.9. Photo-polymer. Photo-polymer used for ADA compliant graphics shall be of the type
that has a minimum durometer reading of 90. Tactile graphics should/must be raised 1/32 inch
from first surface of plaque by photomechanical stratification processes.
12.21.10. Engraving Stock. Engraving stock used for ADA compliant graphic shall be three-ply
lamination contrasting color core meeting ANSI/ASTM D-635-77 test method.
12.22. Reproduction Processes.
12.22.1. Die-cutting. Letter forms and graphics die-cut from vinyl sheeting shall be of the best
commercial quality available. All die-cutting shall be executed in such a manner that all edges
and corners of finished letter forms and graphics shall be true and clean. Letter forms and
graphics with rounded positive or negative corners, or nicked, cut or ragged edges, shall not be
used. All applied die-cut letters and graphics shall be permanently affixed to sign surfaces in
such a manner that all letter surface and edge areas are tightly and evenly adhered to the sign
12.22.2. Silk-screening. All silk-screening shall be executed from photo-screens prepared from
typesetters' reproductions of the copy specified. Typesetters' reproductions shall be no smaller
than 50% of the actual size specified. Graphics shall be assembled as mechanical art in a
professional manner prior to preparation of photo screens. No hand-cut screens shall be used. All
silk-screen printing shall be executed in such a manner that all edges and corners of the finished
graphics shall be true and clean. Graphics with rounded positive or negative corners shall not be
12.22.3. Dry-transfer Letters. Dry-transfer letters shall match the quality of Instant Lettering
brand by Letraset USA, Inc., Bergenfield, NJ; Normatype brand by Keuffel & Esser Co.,
Morristown, NJ; Transfer Lettering brand by Chartpak, Leeds, MA or equal. The Helvetica
medium and Helvetica regular letter forms shall match the samples shown in Figures 2.1 and 2.2
of this pamphlet.
12.22.4. Typesetting. All typeset messages shall be prepared by photo-typesetting equipment.
The Helvetica medium and Helvetica regular letter forms shall match the samples shown in
Figures 2.1. and 2.2 of this pamphlet. No typesetters' proofs shall be enlarged more than three
times for use as a graphic insert.