Picture framing in painting is a visual defect that occurs on painted walls.
Understanding Picture Framing in Architectural Painting
Based on common usage in architectural painting, picture framing is a specific issue related to application techniques. It is defined by a noticeable difference in color or sheen between areas painted with different tools.
Picture framing occurs when a wall is painted with a roller, but is brushed at the edges and corners. This difference in application method often leads to a variation in paint thickness, texture, or drying time between the rolled and brushed areas.
The result is that the brushed sections generally appear darker or have a different sheen compared to the rolled areas. This darker border visually resembles the frame of a picture, hence the name "picture framing." The reference also notes that sprayed areas may be darker than neighboring sections that are brushed or rolled, indicating that inconsistencies can arise whenever different application methods are used side-by-side.
This phenomenon is primarily associated with applying paint to large, flat surfaces like walls or ceilings where multiple tools (brush for cutting in, roller or sprayer for the main area) are used.
Why Does Picture Framing Happen?
Picture framing occurs primarily due to variations in how the paint is applied and how it dries:
- Different Film Thickness: Brushes often apply a thicker layer of paint than rollers or sprayers, especially when cutting in edges.
- Texture Differences: The stipple pattern left by a roller is different from the smoother finish often achieved with a brush. This textural difference can affect how light reflects off the surface, making the colors appear different.
- Drying Rate: Areas painted with a brush might dry faster or slower than rolled or sprayed areas, particularly at edges near trim or corners, which can influence the final color and sheen.
Preventing Picture Framing
Preventing picture framing involves minimizing the differences between the brushed and rolled (or sprayed) areas:
- Consistent Application: Ensure edges are painted thoroughly but without applying excessively thick coats.
- Maintain a Wet Edge: Work quickly to roll the main wall area while the brushed "cut-in" sections are still wet. This allows the paint to blend seamlessly as it dries.
- Use Proper Tools: Select high-quality brushes and rollers appropriate for the type of paint and surface being painted.
- Consider Paint Quality: Higher quality paints often have better leveling properties, which can help minimize the appearance of brush strokes and roller stipple.
- Even Coats: Apply paint evenly across the entire surface, whether brushing or rolling.
By focusing on technique and timing, painters can significantly reduce the risk of picture framing, achieving a uniform, professional finish.
