“It was a dark and stormy night.” Although this part of Edward Bulwer-Lytton's novel Paul Clifford is an infamous example of over-the-top creative writing, it also serves a very important purpose for the "very bad or unpleasant" one. Unpleasant. Not pleasant or comfortable. Upsetting. Cause emotional distress or pain. Using negative words can help convey emotion and create contrast in writing. For example, consider the following sentences: “The party was great. ". “The party was terrible.” Mocker. Suspicious. Mistrustful. It is important to note that the tone of words can change depending on the context of the text. For example, the word "serious" can be positive or negative depending on how it is used. In the sentence “The doctor took the patient’s illness seriously,” the word “serious” is positive. Here's a summary of the different types of tones when writing with AI: Formal tone: Serious, professional, avoid casual slang expressions. . Casual tone: relaxed, informal and conversational style. Humorous tone: light, witty, aims to entertain and amuse. Optimistic tone: positive and hopeful outlook, inspiring and uplifting. We present a novel DFR epoxy-based negative-tone dry film photoresist for the fabrication of multilayer microfluidic devices using a lamination process combined with standard photolithography technology. As a proof of concept, a hydrodynamic focusing device D was produced via a six-layer lamination process, DFR of thickness m,