Which of the following is a vehicle used in making paint?
Try it first: pick an option, then read the explanation.
The Anatomy of Paint
Paint is essentially a mixture of several key ingredients, each with a specific role. Understanding these components is crucial to understanding how paint works. The main components are the Base (provides body), the Vehicle (the liquid that binds everything), the Pigment (provides color), the Solvent (thins the paint), and the Drier (speeds up drying).
Detailed Analysis of the Options
(a) Zinc white
Component Type: Base.
Function: Zinc white (Zinc Oxide) is a solid, white powder that forms the main body of the paint. It provides opacity (hiding power) and protects the painted surface. It is a fundamental part of the solid content, not the liquid carrier.
(b) Linseed oil
Component Type: Vehicle (or Binder).
Function: This is the correct answer. The vehicle is the liquid, film-forming component of paint. It has two main jobs: first, it holds all the solid components (base and pigment) in a liquid suspension, allowing the paint to be spread. Second, upon exposure to air, it hardens or cures to form a solid, tough, and adhesive film that binds everything to the surface. Linseed oil is a classic example of a drying oil used as a vehicle in oil-based paints.
(c) Aluminium powder
Component Type: Base / Pigment.
Function: Finely ground aluminium powder acts as both a base and a pigment. It provides a metallic, silvery finish and creates a durable, protective layer. Like zinc white, it is a solid particle suspended in the vehicle.
(d) Antimony white
Component Type: Base.
Function: Antimony oxide is another white powder used as a base in paint, similar in function to zinc white or white lead. It is a solid component that provides body and opacity.
Key Components of Paint
| Component | Also Known As | Function | Examples |
|---|---|---|---|
| Vehicle | Binder | Liquid part; forms the paint film and binds components | Linseed oil, Tung oil, Synthetic resins |
| Base | Body | Solid part; provides opacity and durability | Zinc white, White lead, Iron oxide |
| Pigment | Colorant | Provides color | Lamp black, Prussian blue, Copper sulfate |
| Solvent | Thinner | Thins the paint for easy application | Turpentine, Mineral spirits, Water |
| Drier | Catalyst | Speeds up the drying of the vehicle | Lead acetate, Manganese dioxide |