Produce chased items for precious metal objects — City & Guilds Limited End-Point Assessment Manufacturing & Engineering Revision

    This subtopic develops advanced skills in producing chased items for precious metal objects, a surface embellishment technique where design patterns are ha

    Topic Synopsis

    This subtopic develops advanced skills in producing chased items for precious metal objects, a surface embellishment technique where design patterns are hammered from the front using a hammer and chasing tools to create intricate relief designs. Learners interpret detailed drawings and specifications to lay out and execute complex patterns, selecting appropriate tools and materials to ensure precision and aesthetic quality. Mastery involves controlling tool movement, depth of impression, and metal behavior to achieve professional finishes on jewellery and silverware components.

    Key Concepts & Core Principles

    Exam Tips & Revision Strategies

    Common Misconceptions & Mistakes to Avoid

    Examiner Marking Points

    Produce chased items for precious metal objects

    CITY & GUILDS LIMITED
    vocational

    This subtopic covers the advanced chasing techniques required to produce complex decorative items from precious metals. Learners will interpret detailed drawings and specifications to execute intricate low-relief designs using a variety of punches and hammers. Mastery of chasing is essential for producing custom, high-value jewellery and small objects such as ornamental boxes or vessels.

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    Learning Outcomes
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    Assessment Guidance
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    Key Skills
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    Key Terms
    8
    Assessment Criteria

    Assessment criteria

    City & Guilds Level 3 Diploma in Jewellery Allied Trades
    City & Guilds Level 3 Diploma in Jewellery and Silverware Manufacturing

    Topic Overview

    The City & Guilds Level 3 Diploma in Jewellery and Silverware Manufacturing is a comprehensive vocational qualification designed for individuals seeking to become skilled craftspeople in the jewellery and silverware industry. This diploma covers advanced techniques in designing, making, repairing, and finishing precious metal items, including rings, bracelets, necklaces, and silverware. Students will develop expertise in traditional handcrafting methods as well as modern technologies such as CAD/CAM, casting, and stone setting. The qualification emphasizes precision, creativity, and adherence to industry standards, preparing learners for roles such as jeweller, silversmith, or workshop manager.

    This diploma is structured around core units that include health and safety, materials science, design principles, and manufacturing processes. Students will learn to work with precious metals like gold, silver, and platinum, as well as gemstones and other materials. Practical assessments and a portfolio of work are central to the qualification, ensuring that learners can demonstrate competence in tasks such as soldering, filing, polishing, and setting stones. The course also covers business awareness, customer service, and quality control, making it ideal for those aiming to start their own business or work in high-end jewellery houses.

    Mastering this diploma is crucial for anyone serious about a career in jewellery and silverware manufacturing. It provides the technical knowledge and hands-on skills required to produce high-quality, bespoke pieces that meet industry standards. The qualification is recognized by employers across the UK and internationally, opening doors to apprenticeships, employment, or further study at higher levels. By the end of the course, students will be confident in their ability to design and manufacture complex jewellery and silverware, from initial concept to finished product.

    Key Concepts

    Core ideas you must understand for this topic

    • →Metallurgy and Material Properties: Understanding the characteristics of precious metals (e.g., gold alloys, sterling silver) and how they behave under heat, stress, and chemical treatments is essential for successful fabrication and repair.
    • →Soldering and Joining Techniques: Mastery of different soldering methods (e.g., hard, medium, easy solder) and joint preparation (e.g., butt joints, lap joints) is critical for creating strong, invisible seams in jewellery and silverware.
    • →Stone Setting: Knowledge of various setting styles (e.g., claw, bezel, pave, channel) and the ability to securely mount gemstones without damage is a key skill for producing high-value pieces.
    • →Design and CAD/CAM: The ability to sketch designs by hand and use computer-aided design (CAD) software to create 3D models, which can then be used for 3D printing or CNC milling, is increasingly important in modern manufacturing.
    • →Finishing and Polishing: Techniques such as filing, sanding, buffing, and applying patinas or plating are vital for achieving a professional, flawless surface finish on metalwork.

    Learning Objectives

    What you need to know and understand

    • Understand how drawings and specifications are used to produce chased work, Understand how to use tools and materials correctly to produce chased work, Be able to produce complex chased items
    • Understand how drawings and specifications are used to produce chased work, Understand how to use tools and materials correctly to produce chased work, Be able to produce complex chased items

    Assessment Criteria

    Key criteria assessors look for in your portfolio

    • Award credit for demonstrating accurate transfer of design from drawing to metal, including precise scaling and alignment of chased elements.
    • Award credit for selecting and using a range of chasing punches (e.g., liner, tracer, matting punches) to create varied textures and crisp, defined lines.
    • Award credit for achieving a consistent depth of chasing without distortion of the metal form, evidenced by clean, sharp detail and a professional finish.
    • Award credit for demonstrating accurate transfer of design from sketch or specification onto the metal surface, ensuring correct scale, proportion, and alignment.
    • Look for evidence of correct tool selection and usage: appropriate lining, matting, planishing, and embossing tools for each stage of the chasing process, with controlled hammer strikes.
    • Assess the ability to chase complex multi-layered patterns with consistent depth, clean undercuts, and smooth transitions, free from tool marks or slippages.
    • Credit observance of material properties: annealing work-hardened areas appropriately, avoiding cracks or distortion in precious metals like silver and gold.
    • Evaluate final finish: properly cleaned and polished chased surfaces that highlight the design without removing crispness of the chased details.

    Assessment Guidance

    Guidance for achieving higher grades

    • 💡When submitting a practical chased item, include a detailed log of tool choices and justification, demonstrating your understanding of how each punch achieves the desired effect.
    • 💡Practice chasing on sample sheets of the same metal to test punch patterns and hammer force before working on the final piece, ensuring consistency.
    • 💡Ensure your portfolio includes high-quality photographs of the design transfer, work-in-progress, and finished piece from multiple angles to provide comprehensive evidence of your process.
    • 💡Start by thoroughly analysing the drawing or specification; mark key reference points, sequence of tool use, and depth requirements before any hammering.
    • 💡Practice on scrap metal of similar gauge and hardness to refine tool technique and pressure before working on the assessment piece.
    • 💡Demonstrate systematic working: chase from the centre outward to control metal flow, and regularly check progress against specifications.
    • 💡Maintain and sharpen tools regularly; sharp, polished chasing tools reduce required force and improve precision.
    • 💡Secure the workpiece firmly in a pitch bowl or engraving block with adequate support to ensure clean, sharp impressions and prevent distortion.
    • 💡Pay close attention to health and safety regulations, especially when using chemicals, heat, and machinery. Examiners look for evidence that you can work safely and responsibly in a workshop environment.
    • 💡In practical assessments, focus on precision and consistency. For example, when filing a ring shank, ensure the thickness is uniform and the edges are smooth. Small details like these can make the difference between a pass and a distinction.
    • 💡When presenting your portfolio, include clear photographs of each stage of the manufacturing process, along with annotations explaining your choices. This demonstrates your understanding of the techniques and your ability to reflect on your work.

    Common Mistakes

    Common errors to avoid in your coursework

    • Misinterpretation of working drawings, resulting in chased designs that do not match specifications in scale or placement.
    • Using blunt or inappropriate punches, which leads to uneven or blurred chased lines and poor definition.
    • Inadequate annealing of the metal, causing work hardening and difficulty in achieving fine detail or causing cracking.
    • Misinterpreting design specifications, leading to incorrect pattern placement or missing details such as fine lines or texturing.
    • Using incorrect or dull chasing tools, resulting in ragged lines, uneven depth, or excessive metal displacement.
    • Applying excessive force, causing tool slippage, damage to the metal surface, or piercing thin gauge sheet metal.
    • Neglecting to anneal the metal during extended chasing, leading to cracking due to work-hardening, especially in complex areas.
    • Poor holding or support of the work (e.g., using an unsuitable pitch bowl or holding device), which absorbs force and blurs the chased impression.
    • Misconception: Soldering is just melting metal together. Correction: Soldering requires precise temperature control and the use of flux to prevent oxidation; the solder flows into the joint by capillary action, not by melting the base metal.
    • Misconception: Stone setting is easy if you have steady hands. Correction: Stone setting demands a deep understanding of the stone's properties (e.g., cleavage, hardness) and the metal's behavior; improper technique can crack stones or loosen them over time.
    • Misconception: CAD/CAM replaces handcrafting skills. Correction: CAD/CAM is a tool that complements traditional skills; a jeweller must still understand design principles, material constraints, and finishing techniques to produce high-quality work.

    Frequently Asked Questions

    Common questions students ask about this topic

    Before You Start

    Prior knowledge that will help with this topic

    • •A basic understanding of jewellery-making techniques, such as sawing, filing, and soldering, typically gained from a Level 2 qualification or equivalent experience.
    • •Familiarity with workshop health and safety practices, including the use of personal protective equipment (PPE) and safe handling of tools and materials.
    • •Basic mathematical skills for measuring, calculating material costs, and scaling designs.

    Key Terminology

    Essential terms to know

    • Understand how drawings and specifications are used to produce chased work, Understand how to use tools and materials correctly to produce chased work, Be able to produce complex chased items
    • Understand how drawings and specifications are used to produce chased work, Understand how to use tools and materials correctly to produce chased work, Be able to produce complex chased items

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