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RTP (Cold Print) Inks
Ferro’s RTP Series (Cold Print) organic inks are opaque screen process inks available in liquid paste form for single-print glass decoration.
Available in a wide range of standard colors, the SpecTrulite™ RTP series of liquid paste organic inks deliver durable and vibrant designs with superior glass adhesion.

SpecTruLite liquid paste organic inks are generally used for single-print applications, however, they can also be used along with our HTP thermoplastic inks in multi-print applications.
Greater Cost Savings
SpecTruLite™ liquid paste opaque organic inks are a ready-to-use single-component formulation requiring no dilution. They also do not require a white underlayer, which can reduce the total amount of white color necessary for decoration and yield cost savings.
RTP (Cold Print) inks work equally well on round, oval and flat glass containers. They must be cured after each print.
As these inks cure at a lower temperature than ceramic inks, less energy is used for heating. Our liquid paste organic inks can also be used on the existing printing machines and equipment already used with traditional inorganic glass enamels.
Vibrant Colors that are Environmentally Friendly
SpecTruLite™ liquid paste organic inks are environmentally friendly inks that are safe to handle and result in reduced emissions compared to traditional ceramic inks. The organic formulation is ideal for post-consumer recycling as the contaminant-free inks can be eliminated when the glass is melted.
Ferro’s SpecTruLite™ liquid paste organic inks are heavy metal-free and comply with the following regulations:
- Packaging and Packaging Waste Directive 2004/12/EC
- CONEG Legislation
- TSCA
- California Proposition 65

FERRO RTP (COLD PRINT) ORGANIC INKS APPLICATIONS
Ferro’s RTP liquid paste organic Inks can be used in the decoration of a wide range of glass containers and products of any shape including:
- Glass packaging for cosmetics and perfume containers
- Glass giftware and advertising specialties
- Glass tumblers and household containers
- Glass tableware
- One-way glass bottles (such as wine, liquor and other beverage bottles)
- Multi-trip returnable glass bottles
- Appliance and decorative flat glass
RTP (COLD PRINT) ORGANIC INKS PROPERTIES AND FEATURES*
Cold Print Organic Inks Properties:
Resin Base in System | Solids | Flash Point | Density | Thinning | Consumption, 270 Mesh | Drying | Shelf Life | Storage |
Epoxy | >98% | >93°C | 1,20 to 1,44 g/cm3 | Products ready to use; thinning possible with 001HTP/RTP thinner | Approximately 0.03 g/cm2 | Remains wet after printing | 6 months | Between 10°C and 35°C |
Cold Print Organic Inks General Performance:
Scuff Resistance | Pencil Hardness | MEK / Acetone Double Rubs | Boiling Water, 30 min. | 24 HR Soak in Water /Ethanol | Dishwasher Resistance (Household) |
Dishwasher Resistance (Professional) | Overprintability |
Outstanding |
>4H | >50 | Pass | Pass | Minimum 500 cycles | Minimum 900 cycles | Not possible. Can be used as a last print on HTP or waterborne coatings. |
Cold Print Organic Inks Application Methods and Usage:
Application Method | Screen Mesh | Squeegee Durometer | Glass Temperature | Cleaning | Curing Temperature |
Curing Time |
Screen printing |
Stainless steel or polyester: 270-325 mesh For metallic: 160 mesh |
70-80 shore |
Between 27°C and 40°C | Acetone, MEK, DBE | 200°C Glass temperature | 20 min. |
*Note: Performance characteristics are based on testing conducted in Ferro development laboratories. Data is given for general comparison only; it is not a guarantee of performance in a particular application. It is always recommended that the customer evaluate the coating for suitability in the intended application. We strongly recommend that all safety precautions be followed as per the relevant Ferro MSDS.
VALUE ADDED GLOBAL SERVICES
Custom Color Mixing

We offer a standard mixing palette of colors, which gives our customers the flexibility of tailoring mixings and color matches onsite.
Our basic mixing capabilities include providing high-gloss clears, opaque, metallic, pearlescent and matt colors, as well as colored imitation acid etches. These coating mixes can be applied singly or in combination as an all-over even finish or to deliver diffused flow-out effects.
Custom Color Matching

Ferro provides complete custom color matching services to help our customers develop new color shades and coatings according to specific requirements, including production methods and desired finishes.
Precise color matching can be achieved using our internal extensive database and color matching expertise. All colors are matched to defined reference samples to ensure exact and consistent color reproduction from batch to batch.