Acabamentos - Comparativo entre os acabamentos

Summary

In this informative video, Kleberson from the Madeira Prima channel conducts a comparative analysis of various wood finishes. He tests different treatments on three types of wood samples to observe their behavior. The finishes include wax, French polishing, marine varnish, PU varnish, copal varnish, and sealer. The video explores the application process, the effect on wood texture and color, and the durability of each finish, providing valuable insights for wood restoration and furniture preservation.

Takeaways

• 📝 The script is a transcript from a video by Kleberson, discussing various wood finishes on different types of wood samples.
• 🪵 The video compares the effects of different finishes such as wax, French polish, marine varnish, copal varnish, and PU (polyurethane) varnish on three types of wood: softwood, hardwood, and medium-density wood.
• 🔍 Kleberson explains the process of applying sealer, wax, and different types of varnishes to observe their behavior on the wood samples.
• 🛠️ The script mentions the importance of the cut ratio for French polish, suggesting a mix of 150 grams of shellac to a liter of alcohol above 94-95% purity.
• 💡 The video highlights that sealer requires fewer applications on hardwood, while cedar absorbs more and needs more applications.
• 🌟 Wax provides a smooth, velvety finish without altering the wood's color, making it a good option for wood finishing.
• 🏷️ French polish, when applied, can slightly yellow the wood and requires a significant number of applications to achieve a high-gloss finish.
• 🚪 The impregnating oil is recommended for outdoor furniture and objects like doors and windows, not typically used for indoor furniture due to its higher cost.
• 🛍️ Copal varnish is suitable for indoor furniture and creates a protective film on the wood without changing its color or gloss.
• 🌊 Marine varnish is designed for furniture exposed to the elements but can also be used indoors, providing a protective layer without altering the wood's appearance.
• 🛠️ The script discusses the application of PU varnish, which is durable and recommended for high-traffic areas, and how it can be made more matte with steel wool if desired.

Q & A

What is the main topic of the video script?

The main topic of the video script is a comparison of different wood finishes, including sealers, wax, French polish, marine varnish, copal varnish, and PU varnish, and their effects on various types of wood.

What types of wood samples were used in the comparison?

The types of wood samples used in the comparison include hard wood (Cumaru), soft wood (Cedar), and medium wood (Pine).

What is the purpose of using a sealer on wood?

The purpose of using a sealer on wood is to protect the wood from moisture and other elements, and to provide a base for further finishing processes.

How does wax affect the wood surface when applied?

When wax is applied, it maintains the smooth, velvety texture of the wood and does not change the color of the wood, providing a natural look while also being waterproof and dirt-repellent.

What is French polish and how is it used in the script?

French polish is a type of wood finish that uses a mixture of shellac and alcohol. In the script, it is used to enhance the wood's surface and bring out its natural shine through a multi-step process involving multiple applications and sanding.

What is the difference between copal varnish and marine varnish according to the script?

According to the script, both copal and marine varnishes create a protective film on the wood surface without altering the wood's color or shine. However, marine varnish is suggested for outdoor use or areas exposed to moisture, while copal varnish is more traditional for indoor furniture.

What is the role of shellac in the finishing process mentioned in the script?

Shellac is used in the French polish process to create a glossy finish and protect the wood. It is also mentioned as a component in the ideal cut for French polish, where it is mixed with alcohol.

What is the recommended application method for PU varnish according to the script?

The script suggests applying PU varnish in a well-ventilated area and using a brush for even coverage. It also mentions the possibility of using a steel wool pad to achieve a matte finish if desired.

How does the script describe the behavior of different wood types with the finishes applied?

The script describes that hard wood like Cumaru shows a slight shine with the sealer, Cedar absorbs the finish almost completely, and Pine also absorbs well, indicating that hard wood may require fewer applications of finish compared to soft wood like Cedar.

What is the purpose of the ideal cut mentioned in the script for shellac and alcohol?

The ideal cut mentioned in the script is a ratio of 150 grams of shellac to one liter of alcohol with a concentration of 94-95%. This mixture is used in French polishing to achieve a high-quality finish on the wood.

What is the final conclusion of the script regarding the wood finishes?

The final conclusion of the script is that all the tested finishes, including sealer, wax, French polish, marine varnish, copal varnish, and PU varnish, have their own characteristics and applications. The choice of finish depends on the type of wood and the desired outcome, with no single finish being the best for all situations.