This unit develops the skills and knowledge required to hand-decorate ceramic items using colours, glazes, and precious metals. Learners will apply decorat
Topic Synopsis
This unit develops the skills and knowledge required to hand-decorate ceramic items using colours, glazes, and precious metals. Learners will apply decorative techniques to meet product specifications and quality standards, ensuring consistency and adherence to health and safety requirements. The unit underpins practical competence in a pottery or ceramics manufacturing environment, preparing learners for roles in finishing and decorating.
Key Concepts & Core Principles
- Health and Safety Compliance: Understanding COSHH regulations, manual handling techniques, and risk assessments specific to ceramics manufacturing, such as silica dust control and kiln safety.
- Raw Material Preparation: Knowledge of clay bodies, glazes, and additives, including mixing, de-airing, and conditioning to achieve consistent properties for forming.
- Shaping Techniques: Proficiency in methods like slip casting, jiggering, jollying, and extrusion, with attention to dimensional accuracy and defect prevention.
- Drying and Firing Processes: Control of drying rates to avoid cracking, and understanding of firing cycles (bisque and glaze) including temperature profiles and kiln atmosphere management.
- Quality Control and Inspection: Use of tools like callipers, gauges, and visual inspection to check for defects such as warping, pinholes, or glaze faults, and adherence to specifications.
Exam Tips & Revision Strategies
- Ensure video evidence clearly shows your technique from start to finish, including safety checks and quality control.
- Keep a detailed log of materials, batch numbers, and any problems encountered to demonstrate knowledge of processes.
- Practice consistent hand skills to achieve uniform decoration across multiple items; evidence of batch work is often required.
- Review the unit’s assessment criteria to ensure all evidence requirements are met, particularly for underpinning knowledge questions.
- During witness testimonies, make sure your supervisor comments on your adherence to specifications and teamwork.
Common Misconceptions & Mistakes to Avoid
- Inadequate surface preparation leading to poor adhesion of decoration.
- Over-application of glaze or precious metal causing runs, drips, or bloating during firing.
- Failure to agitate glazes and colours before use resulting in inconsistent colour or texture.
- Contamination of materials due to unclean tools or mixing of different product types.
- Ignoring drying/curing times between coats, leading to smudging or lifting of previous layers.
- Incorrect firing schedules for precious metals causing oxidation or dull finish.
Examiner Marking Points
- Correct selection and preparation of decorating materials (e.g., glaze consistency, metal compound mixing).
- Demonstration of appropriate application technique (e.g., brushwork, sponging, banding) without drips, sags or unevenness.
- Evidence of checking items against quality specifications (measurements, colour matching, absence of defects).
- Adherence to COSHH regulations and use of personal protective equipment (PPE) when handling chemicals.
- Accurate recording of materials used and waste disposal methods as per environmental procedures.