Instacoat Colour

Product Description

INSTACOATTM Colour is a dry blend of pigments for addition to customers’ own base formulations. These are typically film and sugar coatings. Instacoat Colour also finds use for core colouring of tablets. Products intended for coating applications will normally include an opacifier; core colouring products typically exclude opacifier

Features Benefits
  • Homogenised dry powder system containing all required colours (and opacifiers where present)
  • Enhanced stability compared with liquid systems
  • Avoidance of dust generation and cleaning difficulties that occur during pigment milling
  • Inventory and inventory control simplification and cost savings
  • Advanced colour control methods
  • Reproducible finished product appearance
  • Eliminates need for in-house colour control and adjustment by the customer
  • Avoidance of customer complaints
  • Ready coloured systems matched to your specification or sample are available. Anti-counterfeiting and branding features can be built-in
  • Meeting diverse marketing requirements is facilitated
  • Materials used are checked for compliance with appropriate regulations in target markets
  • Avoidance of regulatory issues
  • Can be applied in a wide range of processes
  • Easy scale-up and transfer to different equipment types or manufacturing sites

Regulatory information

All products are checked for the regulatory compliance of all ingredients in the target countries and market segments of sale. This determination is made at the time the initial formulation is established, based on customer-supplied information. If market countries and/or segments are extended once the formulation has been established, customers are encouraged to contact us to ensure that regulatory compliance is not compromised.

Recommended Solvent System and Reconstitution Level

  • Purified water at up to 25% w/w solids

Equipment / Accessories

  • Variable-speed mechanical stirrer
  • Mixing Vessel

Calculation of Instacoat EHP 250 and solvent quantities

  • Determine the quantities of Instacoat EHP (25% w/w solids) and water required based on the quantity of tablets to be coated and the target coating weight gain. e.g.: For coating 1.0 kg of tablets to 3% wt. gain, weigh 33 g Instacoat and 99 gm purified water at room temperature (includes 10% overage for losses)

Reconstitution Process

  • Add the weighed quantity of water to a mixing vessel.
  • Using a mechanical stirrer, stir the purified water to form a vortex.
  • Add required quantity of Instacoat EHP 250 to the centre of the liquid vortex in a slow steady stream, avoiding clumping while maintaining a vortex. Once the entire quantity of Instacoat has been added, reduce the stirrer speed to eliminate the vortex. (Fig. 2) Continue mixing for 45 minutes.

Recommended Process Conditions

(fully perforated) pans
(non perforated) pans
Pan diameter (inch) 24-60 12-36
Tablet load (kg) 10-300 0.5-50
Weight gain (%) 2.0-3.0%
Number of guns 1-6 1
Liquid nozzle diameter (mm) 1.0-1.2
Atomising air pressure (bar) 2.5-3.5
Pattern air pressure To achieve maximum uniform bed coverage
Tablet bed temperature (⁰C) 42-45
Inlet air temperature (⁰C) Set to achieve required product bed temperature
Suspension spray rate Set to achieve required product bed temperature
Exhaust air volume To maintain slight negative pressure in pan
Pan speed Minimum for steady tablet flow through spray zone

*Tablet bed temperature offers the most effective way of controlling the coating process. Where this measurement is unavailable, exhaust temperature may be substituted. However, the relationship between the two measurements is complex and depends on several factors such as pan load, pan depression, pan design and airflow rate. Indicated exhaust temperature may be above or below the true bed temperature. It is recommended that the relationship between the two measurements is calibrated.

Typical Constituents

PVA; Plasticiser; Titanium Dioxide; Edible Pigments, Anti-Tack & Adhesion Enhancing agents.