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By withdrawing a metal frame from a surfactant solution through the interface in aclosed system, a planar soap film can be easily formed. Freshly formed soap film may betoo thick to manifest its color, but it will give beautiful and continuously changinginterference color while the film is thinning with the drainage of water under the influence
By withdrawing a metal frame from a surfactant solution through the interface in aclosed system, a planar soap film can be easily formed. Freshly formed soap film may betoo thick to manifest its color, but it will give beautiful and continuously changinginterference color while the film is thinning with the drainage of water under the influence