Review Reports

Round 1

Reviewer 1 Report

You correctly mention in your paper that Additive Manufacturing has undergo a dramatic development. To use it as an efficient and time saving production method it needs a thorough understanding of the physics which govern the process. For sure, the knowledge of the rheological properties of the material to be printed is important to understand the process properly and to know which properties are essential for the process. Additionally, as you said, it is important to know how to influence the properties. Unfortunately your approach is not totally convincing: You present a lot of rheological "misunderstandings" which are misleading for the reader. Secondly you are presenting a lot of different procedures and materials which have been developed and used for 3 D printing. But no where I find a clear statement which properties are favorable for the printing and how these properties can be adjusted. I recommend you to ask a person who is familiar with rheology to have a look on your paper and to correct your messages where it is necessary. Further, you should find the most important rheological properties and how they should be adjusted. You should demonstrate with examples from the literature how it works. This will give the reader a chance to learn and to transfer to his own problems. On page 1, line 45 you promise to present: "tailoring suspension rheological properties". Unluckily you don't do .

Author Response

Dear reviewer,

Many thanks for your comments concerning our manuscript entitled “Principles of dispersing powders for 3D printing”. Firstly, we sincerely apologize for our misoperation: A wrong  manuscript was upload and there are obvious mistakes such as figure number and reference problems. We are so sorry! Secondly, thanks for your comment. Would you please give us some examples? That is, what are the misunderstandings you mentioned in your comment? Regarding your questions on “rheological properties of the materials” for 3D printing, “how these properties can be adjusted”, etc., please see Section 3.2.1, 3.2.2 (Table1), 3.3.1, 3.3.2(Table2), etc. Note that this manuscript is not an experiment report or a research paper, which should include procedures and processings to adjusting the rholocial properties of suspensions.

Thanks again for your time and comments!

Best wishes!

Yours,

Prof. Xiaofeng Wang

School of Materials Science and Engineering,

Central South University,  

Changsha, Hunan 410083, China

Tel: 8613467516329

Email: wangxiaofeng@csu.edu.cn

Reviewer 2 Report

I have attached the review report

Comments for author File: Comments.pdf

Author Response

Dear reviewer,

Many thanks for your comments concerning our manuscript entitled “Principles of dispersing powders for 3D printing”. Firstly, we sincerely apologize for our misoperation: A wrong  manuscript was upload and there are obvious mistakes such as figure number and reference problems. We are so sorry! The comments are all valuable and very helpful for improving our paper. We have carefully checked the comments and made corresponding corrections. Revised parts have been highlighted in red in the revised manuscript. The main corrections and the responses to reviewer’s comments are listed in a document attached to this mail.

Thanks again for your valuable comments!

Best wishes!

Yours,

Prof. Xiaofeng Wang

School of Materials Science and Engineering,

Central South University,  

Changsha, Hunan 410083, China

Tel: 8613467516329

Email: wangxiaofeng@csu.edu.cn

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Line 64: you are referring to Fig. 1. Fig one is not explained, meaning of the axis is not clear. Either you explain here in the text or do it in line 103

line 83: ways instead of way

line 83: The last sentence is not a complete sentence

line 87: The meaning of the sentence is not clear. Why is it a critical approach?

line 101: Fig 1 A: see above

Fig 1 B: a: Line 1 has to start at 0,0!

Fig 1 C: check the diagrams

line 111: Not a complete sentence

line 117: where is the double layer shown in Fig 2?

line 123: Where is the DLVO theory shown in fig 1?

line 156: what do you mean with "rheological response " in this context

line 159: viscoelastic behaviour is not necessarilly coupled with oscillatory flow

line 161: is a function of

line 162: what do you mean with: relative to its original composition …..?

line 164: see above

line 168/171: Are you aware that Bingham material exhibits yield stress? When yes, why don't you mention it?

line 178: Viscoelastic behavior is not related with oscillatory flow. This kind of flow is applied to investigate viscoelastic properties.

line 181 and following: Why do you explain this matter. Your explanations are to short to let the reader understand. My advice: skip it

line 215: What do you understand under a "linear characteristic fluid"?

line 220: What ius "the linear"? The whole sentence doersn't make sense

line 227: What does it mean: fluid generation device? What does it mean: to form a linear fluid?

line 236: What are "good elastic properties" and for what reason are they necessary

line 241: What is a "linear fluid"?

line 245: If you refer to a Bingham Fluid then n = 1. 

line 258: How is y defined? Where do I find G' - which is the storage modulus, nort elastic modulus.?

line 265: What are "elastic properties" ?

line 271: the whole paragraph is not understandable. Explanations for Fig 2 are missing

line 284: What is a "fluid dynamic suspension"?

line 335: … are easy to achieve.

line 346: suspensions are...

line 349: What do you understand under "moisturizing effec"?

line 375: What is a " sediment fluid"?

line 375/76: What is a "characteristic fluid device"?

What is a "suction device?

line 392: you promise "the following results" but no results are shown

 

 

Author Response

Dear reviewer,

Many thanks for your valuable comments concerning our manuscript entitled “Principles of dispersing powders for 3D printing”. The comments are all valuable and very helpful for improving our paper. We have carefully checked the comments and made corresponding corrections. Revised parts have been highlighted in yellow in the revised manuscript. The main corrections and the responses to reviewer’s comments are listed in a document attached to this mail.

Thanks and best wishes!

Yours,

Prof. Xiaofeng Wang

School of Materials Science and Engineering,

Central South University,  

Changsha, Hunan 410083, China

Tel: 8613467516329

Email: wangxiaofeng@csu.edu.cn

Author Response File: Author Response.pdf

Reviewer 2 Report

Thank you, I do not have further adjustments

Author Response

Thanks for your valuable comments!