Lesson Notes By Weeks and Term v3 - Senior Secondary 1
Download the Lessonotes Mobile Nigeria 2025 app for faster lesson access on Android and iPhone.
Download the Lessonotes Mobile Nigeria 2025 app for faster lesson access on Android and iPhone.
Subject: Printing Craft Practice
Class: Senior Secondary 1
Term: 2nd Term
Week: 4
Theme: Screen Printing Reproduction
This page supports the lesson note with a companion video and a short classroom-ready summary.
For class groups and homework, share this lesson page so learners also get the summary, objectives, and full lesson context.
This topic focuses on fundamental practical skills in printing craft: accurate alignment of printed elements and the creation of prints using stencils. These skills are crucial for producing visually appealing and professional-quality prints, which are essential in various aspects of Nigerian life, from small-scale business signage and textile design to educational materials and community event promotion. Understanding these techniques empowers learners to engage in entrepreneurial ventures and contribute to the local creative economy.
printed, inspect the final design. The yellow sun should be perfectly aligned with the green leaves, and the registration marks should overlap precisely. The printed marks can then be trimmed off.
C. Stencil and Stencil Printing: A stencil is a thin sheet of material with a design or pattern cut out of it. When ink, paint, or other colouring media are applied over the stencil, the colour passes through the cut-out areas, transferring the design onto the surface beneath. Stencilling is a versatile and relatively simple printing method suitable for various applications.
Materials for Stencils: Paper/Cardboard: Affordable and easy to cut (e.g., manila card, Bristol board). Suitable for single-use or short-run prints.
Plastic Sheets: More durable and reusable (e.g., acetate sheets, overhead projector transparencies, thin plastic folders).
Specialised Stencil Films: Designed for durability and precision cutting, often used in professional screen printing.
Other: Metal, wood (for larger, more rigid stencils).
Types of Stencils: Single-layer Stencil: A single sheet with the entire design cut out.
Multi-layer Stencil: Used for complex multi-colour designs, where each colour might have its own stencil layer.
Bridges/Ties: In traditional stencilling, small un-cut sections (bridges) are often left to connect isolated parts of a design (e.g., the centre of an "O" or "A") to the main stencil sheet. These bridges become part of the design and need to be considered. Process of Making a Stencil (Worked Example - Simple Geometric Shape/Letter): Imagine creating a stencil of the letter "A" for a local signage project.
1. Design: Draw or print the letter "A" clearly on a piece of paper. Ensure it is bold enough for stencilling.
2. Material Selection: Choose a suitable stencil material, e.g., a thick cardboard or a clear plastic sheet.
3. Transfer Design: Place the design paper over the stencil material and secure it. Trace the outline of the "A" onto the stencil material using a pencil. Alternatively, if using a thin plastic sheet, the design can be placed underneath and traced directly.
4. Cutting: Carefully cut out the traced design using a craft knife or sharp scissors. For intricate designs, a cutting mat is essential to protect the work surface. Ensure smooth edges for a clean print.
Self-correction tip: When cutting an "A", remember to cut out both the outer shape and the inner triangle. The inner triangle must remain connected to the main stencil with a "bridge" if it is to print as a solid shape, or it can be a separate piece if desired for a different effect. For initial practice, a simple outline without an inner cut is easier.
5. Finishing: Check for any rough edges. These can be smoothed with fine sandpaper or by carefully re-trimming with the knife. Process of Making Prints Using a Stencil (Worked Example - Printing on Fabric): Using the "A" stencil created above, to print on a plain T-shirt for a community event.
1. Prepare the Substrate: Lay the T-shirt flat on a hard, clean surface. Place a piece of cardboard inside the T-shirt, directly under the area to be printed, to prevent paint bleeding through to the back and to provide a firm printing surface.
2. Position the Stencil: Carefully place the "A" stencil onto the T-shirt in the desired location.
3. Secure the Stencil: Use painter's tape or spray adhesive to temporarily secure the stencil to the fabric. This prevents it from shifting during printing. Ensure all edges are pressed down firmly.
4. Apply Paint/Ink: Dip a stencil brush, sponge, or squeegee into fabric paint or ink. Ensure not to overload the brush/sponge. Gently dab or brush the paint over the cut-out areas of the stencil. For fabric, it's often better to dab vertically to push the paint into the fibres, rather than brushing side-to-side which can force paint under the stencil edges. * Apply even pressure to ensure consistent coverage.
5. Remove the Stencil: Carefully lift the stencil straight up from the fabric immediately after applying the paint. Do not slide it, as this can smudge the print.
6. Drying and Curing: Allow the printed design to dry completely. For This section delves into the practical aspects of achieving quality prints through precise alignment and the use of stencils.
A. Print (in the context of this lesson): In Printing Craft Practice, "print" refers to the process of transferring an image or design from one surface (e.g., a printing plate, stencil, or screen) onto another (e.g., paper, fabric, wood) using ink, paint, or other colouring media. This lesson specifically focuses on manual printing methods that involve registration and stencilling.
B. Registration in Printing: Registration refers to the accurate alignment of multiple colours or design elements on a substrate (the material being printed on) to ensure they combine correctly without overlaps, gaps, or shifts. Achieving good registration is critical for producing clear, sharp, and professional-looking prints, especially in multi-colour jobs.
Importance of Registration: Clarity and Sharpness: Ensures that all colours or design elements sit precisely where they are intended, preventing blurred or fuzzy images.
Professional Appearance: A well-registered print conveys professionalism and attention to detail, which is vital for any commercial or artistic product.
Colour Integrity: Guarantees that colours combine accurately to form the desired final image, preventing unintended colour shifts or misalignments.
Waste Reduction: Poor registration leads to wasted materials (paper, fabric, ink) and production time, increasing costs.
Registration Marks: These are small, distinct marks placed outside the live area (the printable area) of a design. Their sole purpose is to aid the printer in aligning different colour separations or layers of a job accurately.
Common Types of Registration Marks: Crosshairs: Simple cross shapes (+ or x) often with a small circle at the intersection. These are the most common and effective.
Dots/Circles: Small solid circles used for alignment.
Corner Marks: L-shaped marks placed at the corners of the print area to define the trim edge and aid in paper alignment.
Placement: Registration marks are typically placed in the same relative position on each printing plate or stencil for a multi-colour job. They should be positioned in the margins, well outside the image area, so they can be trimmed off after printing. Process of Manual Registration (Worked Example - for a two-colour design): Imagine printing a school badge with two colours: green for the leaves and yellow for a sun.
1. Design Separation: The artwork is separated into two distinct components: one for the green leaves and one for the yellow sun.
2. Add Registration Marks: Identical registration marks (e.g., two crosshairs, one at the top centre and one at the bottom centre) are added to both the green artwork and the yellow artwork, ensuring they are in the exact same position on both.
3. Prepare Printing Tools: Create separate stencils or printing plates for the green and yellow components. The registration marks should be present on each stencil/plate.
4. First Colour Print (e.g., Green): Secure the printing surface (e.g., paper) to a printing board. Position the green stencil/plate over the paper. Use tape or a hinge mechanism to ensure the paper remains in the same position for subsequent prints. Print the green colour. The registration marks will also print.
5. Second Colour Print (e.g., Yellow): Without moving the paper from its fixed position, carefully remove the green stencil/plate. Position the yellow stencil/plate over the same paper.
Alignment Step: Align the registration marks on the yellow stencil/plate precisely over the green registration marks already printed on the paper. This is the critical step. Once aligned, secure the yellow stencil/plate. Print the yellow colour.
6. Inspection: After both colours are printed, inspect the final design. The yellow sun should be perfectly aligned with the green leaves, and the registration marks should overlap precisely. The printed marks can then be trimmed off.
C. Stencil and Stencil Printing: A stencil is a thin sheet of material with a design or pattern cut out of it. When ink, paint, or other colouring media are applied over the stencil, the colour passes through the cut-out areas, transferring the design onto the surface beneath. Stencilling is a versatile and relatively simple printing method suitable for various applications. overload the brush/sponge. Gently dab or brush the paint over the cut-out areas of the stencil. For fabric, it's often better to dab vertically to push the paint into the fibres, rather than brushing side-to-side which can force paint under the stencil edges. Apply even pressure to ensure consistent coverage.
5. Remove the Stencil: Carefully lift the stencil straight up from the fabric immediately after applying the paint. Do not slide it, as this can smudge the print.
6. Drying and Curing: Allow the printed design to dry completely. For fabric paints, follow the manufacturer's instructions for heat-setting or curing, which often involves ironing the design to make it permanent and washable.
7. Clean Stencil: Clean the stencil immediately with water or appropriate solvent before the paint dries, to ensure it can be reused.
Teacher Activities: Introduction & Review: Begin by reviewing previous relevant topics. Introduce the concept of "print quality" and how alignment contributes to it.
Define and Explain: Clearly define "registration" and "stencil printing" using visual aids (charts, sample prints, digital images).
Demonstrate Registration Marks: Show students different types of registration marks and physically demonstrate their placement on artwork templates. Use two overlapping transparent sheets or paper cutouts to simulate a multi-colour job, showing how marks aid alignment.
Demonstrate Stencil Making: Conduct a live demonstration of creating a simple stencil (e.g., a letter, a basic shape, or the map of Nigeria) from a chosen material like cardboard or plastic. Emphasize safe use of cutting tools.
Demonstrate Stencil Printing: Perform a live demonstration of using the self-made stencil to print on a suitable surface (e.g., paper, a small fabric swatch). Highlight securing the stencil, even paint application, and careful removal.
Practical Task Setup: Distribute materials (paper, cardboard, cutting tools, paints, brushes, fabric swatches) for practical activities.
Supervise and Guide: Circulate among students, providing individual guidance, correcting techniques, and answering questions during practical sessions. Ensure safety protocols are followed, especially with sharp tools.
Facilitate Discussion: Encourage students to share their observations, challenges, and successful techniques.
Student Activities: Listen and Participate: Actively listen to explanations, observe demonstrations, and participate in Q&A sessions.
Note-Taking: Take detailed notes on definitions, procedures, and safety tips.
Registration Mark Practice: Given a simple two-colour design template, students will draw and place appropriate registration marks on both colour separations. They will then practice aligning the two printed sheets using the marks.
Stencil Creation: Students will design a simple stencil (e.g., their initials, a simple geometric shape, or a local motif like a kola nut) and then cut it out from cardboard or plastic sheet using appropriate tools.
Stencil Printing Practice: Using their self-made stencil, students will practice printing the design on paper and/or a small fabric swatch. They will focus on securing the stencil, applying paint evenly, and carefully removing the stencil.
Peer Review: Students will observe and constructively critique each other's stencil creations and printed results, focusing on neatness, clarity, and alignment.
Clean-up: Properly clean tools and workspace after the practical session.
Local Business Branding and Advertising: Many small and medium-sized enterprises (SMEs) in Nigeria, such as barbershops, tailors, roadside eateries, and kiosks, rely on affordable, custom-printed materials. Knowledge of registration ensures their multi-colour logos on shop signs, fliers, or custom packaging (like paper bags for bakeries) look professional and appealing. Stencil printing is a cost-effective method for them to produce branded T-shirts, caps, or fabric bags without investing in expensive machinery. Textile and Fashion Industry (Adire, Ankara, Custom Wear): The principles of registration are fundamental to the production of intricate multi-colour textile designs, like those found in Ankara fabrics, ensuring patterns align perfectly. Stencilling offers a simpler, manual approach for creating unique patterns on Adire fabrics, customising plain garments, or adding embellishments to fashion accessories. This skill can lead to entrepreneurial opportunities in custom fashion design.
Community Development and Arts & Crafts: Stencils are widely used in community art projects, such as creating murals for public spaces (schools, health centres), producing posters for awareness campaigns (e.g., health, environmental protection), or making decorative items for cultural festivals. These skills enable individuals to contribute to community beautification and expression using readily available materials and simple techniques. It fosters creativity and promotes local artistic talent.