In Leerling Van der Vloet, the viewer sees a young man depicted with a thoughtful expression. The colors are warm, with soft browns and subtle highlights that bring depth to the face. The background is muted, allowing the figure to stand out prominently.

The overall composition draws the eye directly to the subject's face, emphasizing his contemplative mood. The painting is executed in oil on canvas, showcasing Alfred Ost's skill in capturing realistic human features. The brushwork is fine, allowing for detailed textures in the skin and hair. The use of light and shadow adds a three-dimensional quality to the portrait.

This attention to detail is characteristic of the Realism style, which aims to portray subjects as they are. Alfred Ost was a Belgian painter known for his portraits and genre scenes. Leerling Van der Vloet reflects his ability to convey personality through facial expressions. An interesting fact about this work is that it was likely created during a period when Ost was experimenting with different techniques in portraiture.

This painting exemplifies his transition towards a more detailed and realistic style.