Enthone 50-110RX Series Legend Inks are permanent, two component, epoxy-based screen printing inks.
They may be used with a selection of catalysts which cure at  elevated and/or room temperatures.
When properly applied and  cured, Cat-L-Inks have excellent adhesion to photoimageable, thermal
and UV solder masks, glass, metal and  plastic. They have excellent chemical and thermal resistance  
properties.  50-Series Cat-L-Inks are used in the  electronic, aerospace,  automotive,  appliance  and
decorative container industries. Uses include the permanent  marking of circuit  boards, semiconductor
components, connectors, dials,  nameplates, edge-lit panels, chassis,  glass and thermoplastics.

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MacDermid Enthone Safety Data Sheets

50-Series Safety Data Sheets

MacDermid Enthone Specifications

Below are approved Customer Ink Specifications for the defined Issuers
  • Specifications
    ISSUER  SPEC # REV INK Products 
    Lincoln Composites 11575 B 50-700R, 50-100R, Cat 9
    Vicor 14950 00 AD2003
    Raytheon 417301 BD 50 & M-series, SE1619, SE2180, w/9, 20/A, 28, 45 77
    Remec 500465 H M0N, M0NC, M9N, M2N, B-3
    ITT Aerospace 561413 D M-9, -0, -0NC;  Cat 45, 20/A
    Hughes Aircraft 760696 E 50 Series & M Series
    Northrop-Grumman 960667 B 50-771R, 50-100R, Cat 9
    ATK Thiokol 2002527 A M-3-N, M-4-N, M-9-N, M-0-NC, B-3, 20/A, AD2002, AD2003
    Sanders- Lockheed Martin 2280876 W M Series, Cat 77, AD2002
    Spar Aerospace 2538492 1 Catalyst 20/A
    Navy 5675167 G 50-202BR, 50-100R, 50-771R, Cat 9, Cat 20/A
    Navy 5823349 J 50-202BR w/Cat 9
    Navy 5823519 B 50-800 w/Cat 9
    Navy 5823520 F AD2001
    Navy 5823521 G 50 Series w/Cat 20A
    Navy 5823522 C M Series w/Cat B3
    Lockheed Martin 7520558 W M-; Cat 20/A, B5, B13/28, B3
    General Electric 7539940 D AD 2002, AD 2003
    Lockheed Martin 7846193 F M-series, Catalyst 20/A
    BAE Systems 8353154 A M-0-N, M-9-N, B-3
    BAE Systems 8519182 M-9-N, M-0-NC, CATALYST B-13/28
    EMC Technology 8664015 M M-series, 50-600R, B-3, 5
    Raytheon 13563523 50-810R w/Cat 77
    Navy 28635859 F 50 Series w/Cat 20A
    Rockwell Collins 005-8203 AL 50-Series, Cat 28, 9, 45, B-3
    Spectrolab 044417 NC 50 Series Inks and Catalysts
    DRS Technology 0800107 A M-series, Cat 5 & 20/A
    Space Systems/Loral 11-P12288 16 50 -Series
    General Electric 171A4505 B M-Series w/Cat 20 A, B3
    BAE Systems 174A235 A M-0-N, M-9-N, B-3
    Lockheed Martin 174A235 M0N/B3, M9N/B3, 50-700R/Cat 9, 50-100R/Cat 9
    Aeroflex 25E667 T M-0-N, M-9-N, B-3
    Smith’s Industries 3-016-xxx B M0NC, M-9-N (Type I and II), M-0-N, M-2-N.,M-4-N, B-13/28
    Lockheed Martin 356A7702 B M-2, -9, -4, -0-N, Cat 28/B-13
    Eastman Kodak 400-2081 AC 50-Series and CAT 9/20/28
    Eastman Kodak 400-3810 B M-Series w/CAT 20/A, B3, B13/28, 45, 77. AD2002 and AD2003
    ITT Space Systems,LLC 400-3810 J M-series, Catalyst 20/A, 77, 45 & B-13/28
    ITT 419-246 AD 2003
    Orbital Sciences 42-0074 A 50 Series w/Cat 28
    Pacific Scientific 50971xx J M-Series w/Cat 20/A
    Honeywell 530-2500 F M –  (No Catalyst)
    Honeywell 530-2546 E M-9-N, M-0-N Cat 20/A, B-3
    Custom Electronics 5-707 E M- and 50- Series
    General Dynamics 760-79055 H 50 Series w/Cat 20A
    G&H Technology 999-158 C 50- & M-series w/9, 45, 28
    Moog Inc. A58338 L M-; Cat 20/A, B13/28
    Boeing AB0290-002 M 50-Series & M-Series, Cat 9, B3, 20/A, B13/28
    Ablestik APS-101000 B Catalyst 20/A
    Ablestik APS-101008 D M-0-N
    Boeing BMS10-54 H 50-100R, 50-771R, 50-800R w/ Cat 9
    Boeing BMS10-94 A SR1000
    Kearfott C1011200xx J 50 Series & M Series w/Cat 20/A
    Kearfott C10112010x P M0N, M9N, M2N, w/Cat B3
    Kearfott C1011211xx P 50 Series & M Series w/Cat 77&45
    TRW C258813 H M -Series w/Cat 20A
    TRW C802918 A 50-100R, 50-800R
    Pratt & Whitney CMS0106 B M-9-N, M-0-N, B-3, 20/A
    EMS Electromagnetic CRD-458602 M-Series and all catalysts
    Lockheed Martin D227 G19 M-Series except M-1-N
    Hamilton Sundstrand ED742731 O 50-100R,50-110RX,50-201AR,50-300R,50-507R,50-700R,50770R, 50-771R,50-206R,CAT 9, B-13/28, 20/A
    Jewell Instruments ES4817-002 C M0N, M3N, Cat 9, Cat 20/A
    Honeywell FMC8030-01 H M-0-N w/Cat20/A
    Honeywell FMC8030-02 G M-9-N w/Cat 20/A
    Honeywell FMC8030-05 E M-3-N w/Cat 20/A
    Honeywell FMC8030-06 G M-4-N w/Cat 20/A
    Honeywell FMC8030-07 E M-5-N w/Cat 20/A
    Honeywell FMC9029-01 G M-0-N w/Cat B3
    Honeywell FMC9029-02 G M-9-N w/Cat B3
    Honeywell FMC9029-04 F M-2-N w/Cat B3
    Honeywell FMC9029-06 F M-4-N w/Cat B-3
    Honeywell FMC9029-07 G M-5-N w/Cat B3
    Honeywell FMC9029-08 C M-6-N w/Cat B3
    Honeywell FMC9029-09 F M-7-N w/Cat B3
    Honeywell FMC9710-01 M-0-N w/Cat B13/28
    Honeywell FMC9710-02 M-9-N w/Cat B13/28
    Honeywell FMC9710-04 M-2-N w/Cat B13/28
    Honeywell FMC9710-06 M-4-N w/Cat B13/28
    Honeywell FMC9710-07 M-5-N w/Cat B13/28
    Honeywell FMC9710-08 M-6-N w/Cat B13/28
    IRC Proprietary GM EZ-S01-01-012 PRI SR1000 w/AD5003
    M. C. Gill GMS RI001 E 50-400R
    M. C. Gill GMS RI012 C Catalyst 9
    Grumman Aerospace GP14A AB 50 Series w/Cat 20, B3, 9
    Raytheon HMS 2229 A AD2002
    Raytheon HMS 2277 C M0NC, B-3, Cat 77
    Honeywell HMS 70181-02 C M-2-N, Cat 20/A and Cat 45
    Raytheon HP8-5 AB 50-770R, 50-771R, M-0-NC, Catalysts B-13/28, 77, 20/A
    Lockheed Martin LAC 3575 AF 50-Series & M-Series, Cat 9, 77, 20/A
    Northrop MA3500 E 50-800R, 50-771R, 50-100R, 50-300R, Catalyst B13/28
    Boeing MBO-190-003 L 50-series, Cat B13/28
    Boeing MBO-190-006 G M – 20/A, B-13/28
    Honeywell MC8030-08 D 50- M-Series
    Honeywell MCS9066 K 50- M-Series, 20/A
    Army MIL-I-43553 A M and 50 Series (w/exceptions)
    Army MIS37271 B M Series w/Cat 20A
    Raytheon MPN0190 D M0NC/B13 Bi-Pack
    Honeywell MPS1600005 50-770R w/Cat 28
    Litton MS-2301 J M Series w/Cat 20
    Litton Airtron MS-2919 B AD2002
    Hamilton Sunstrand MS40-16 H M0NC, M-9-N, M-2-N, M-4-N, B-3, B13/28, 45, 77
    Jackson & Tull MSI6.0.1 All products (QA Provisions)
    TRW MT12-2B B 50-Series Inks
    Orbital Sciences (Fairchild) P7510000 E M-0-N, M-9-N, M-2-N, M-4-N. M-5-N, B-3, B-13/28, 20/A
    Honeywell P8258243 K 50 Series w/Cat 20 & 9
    Pratt & Whitney RBO190-009 B Type I = M-2-N, M-3-N, M-4-N, M-5-N. M-6-N,M-9-N, M-0-N                                                                                                                                                     Type II = M-2-N, M-3-N, M-4-N, M-5-N. M-6-N,M-9-N, M-0-NC,                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     50-100R, 50-770R, 50-771R, Cat 9, Cat 20/A
    PRO-PAC SAI-SPEC-935 A M-9-N w/ Cat 20/A bipack
    EMS Technologies SID458601 + CN01 A M0N, M9N, M4N/CAT 20A
    Raytheon SM80262 & SM80263 B & C 50 & M-series Type I, 20/A,  9, 45, B13/28,  B-3, and 77
    Hamilton Sunstrand STBM0001 H 50, M-series B-13/28, 20/A
    Martin Marietta STM Y839 6 50 & M Series (Louisiana only)
    Martin Marietta STM Y839 7 50 & M Series
    Boeing STM0905-02 C 50-series w/Cat 77, 10-105, M-9-N w/Cat 77, M-0-NC with B-13/28
    ULA STM0905-02 F 50-Series w/ Catalyst  77, M-9-N w/Catalyst 77 and Catalyst B3
    M-0-NC w/ Catalyst B3 and B13/28
    ATK Thiokol TD103735 M-0-N w/ 20A or 10cc Bipack
    Kearfott Y122A054 A M-0-NC, M-9-N, M-3-N, Cat 20/A

MacDermid 50-Series Colors and Catalysts

  • 50-Series Ink Colors and Catalysts
    Ink Number Color Recommended Catalyst Mix Ratios
    Catalyst Additions Parts by Weight per 100 Parts Ink
    All Catalysts (except Catalyst 5) Catalyst 5 Only
    50 100R White 9 6.0 8.5
    50 110RX White, Matte 9 5.0 NR
    50 120R Hi-Hide White 9 4.5 7.0
    50 201AR Lemon Yellow (Cadmium) * 6.0 8.5
    50 202BR Medium Yellow (Chromium) 1 * 6.0 8.5
    50 206R Orange (Chromium) * 6.0 8.5
    50 300R Emerald Green (Cadmium) * 6.0 8.5
    50 301R Deep Green (Cadmium) * 7.0 9.5
    50 400R Ultramarine Blue * 6.5 9.0
    50 403R Light Blue * 6.0 8.5
    50 506BR Deep Red (Chromium) * 6.0 8.5
    50 507R Medium Red (Cadmium) * 6.0 8.5
    50 508R Medium Red (Chromium) * 6.5 9.0
    50 600R Chocolate Brown (Chromium) * 7.0 9.5
    50 700R Black 2 * 7.0 9.5
    50 710R Black, Matte 2 * 4.0 NR
    50 770R Black, Matte (Nonconductive) B-13/28 6.5 NR
    50 771R Black, Gloss (Nonconductive) * 6.0 8.5
    50 800R Clear, Gloss * 9.0 11.5
    50 810R Clear, Matte * 6.0 8.5
    Catalyst Cure Average Pot Life (hours)
    20/A Basic air cure catalyst. Cures at room temperature in 5 to 7 days. Tack free after 1 to 2 hours. May also be heat cured. R.T. or Heat 2
    B 3 Basic heat cure only catalyst. Higher cure temperatures decrease cure time. Heat 4
    5 Long pot life. Excellent adhesion properties. Special mix ratios are required for this heat cure only catalyst (refer to Color Numbers and Mix Ratios Section). Heat 24 Max*
    9 Basic heat cure only catalyst with good anti-yellowing resistance. (Recommended for use with 50-110RX). Heat 7
    B 13/28 Accelerated air cure catalyst. Cures at room temperature in 3 days. Shorter pot life. R.T. or Heat 1
    45 Long pot life. This heat cure only catalyst contains adhesion promoters. Provides excellent adhesion to glass and metals with good water resistance. Slightly decreases solvent resistance. Heat 12
    77 Adhesion promoting catalyst. Cures at room temperature in 5-7 days. Provides similar characteristics as Catalyst 45. Maximum adhesion is achieved by heat cure @ 65.6 to 93.3 °C (150 to 200


    R.T. or Heat 1

MacDermid Enthone Letters of Qualifications

Below are 2021 Letters of Qualification
  • 2021 Letters of Qualification

    Qualification 2021 letter 50 Series to MIL-I Rev A File:PDF file icon.svg - Wikimedia Commons

    Qualification 2021 letter M-Series to CID rev D File:PDF file icon.svg - Wikimedia Commons

    Qualification 2021 letter 50-Series to CID rev D File:PDF file icon.svg - Wikimedia Commons

    M-Series to MacDermid Enthone’s Specification 2021 File:PDF file icon.svg - Wikimedia Commons

    Qualification 2021 letter M-Series to MIL-I Rev A File:PDF file icon.svg - Wikimedia Commons

    2021 Cover Letter for Annual Qualification Letters File:PDF file icon.svg - Wikimedia Commons

    2021 Listing of A-A-56032D & MIL-I-43553A Qualified Inks File:PDF file icon.svg - Wikimedia Commons

    50-series to MacDermid Enthone’s Specification 2021 File:PDF file icon.svg - Wikimedia Commons


Request Information

General Information


50-Series Ink Color


Catalyst Select


Kit Size







Monofilament polyester or metallized polyester fabrics with a mesh count from 180 to 350 are recommended.

Equivalent stainless steel fabrics may also be used. Mesh tension should be to fabric manufacturer’s



Squeegees should be between 60-80 durometer, sharp and free of nicks. Squeegee durometer, pressure, angle

and print speed should be adjusted according to the overall printing parameters to ensure consistent print

definition and ink film thickness.


Any lacquer resistant Direct, Indirect, Direct/Indirect or Capillary Stencil system.


If thinning is required, add small amounts of AD2001 or butyl cellosolve acetate. Additions should be made

after the induction period.Thinner additions extend the pot life.


Small amounts of AD2003 or carbitol acetate are recommended. Additions should only be made after the

induction period has been observed.


Following the induction period, thin with AD2002 or a blend of 80% PM glycol ether and 20% methyl isobutyl

ketone at 25-50% by volume, depending on air pressure and orifice of spray unit. Thinner additions

will extend the pot life considerably.


Enthone SC1710 screen cleaner, AD2003 or any lacquer wash will effectively clean screens and

equipment before the ink cures.