The authors wish to make a change to the published paper [1]. In the original manuscript, there are mistakes on the scale bar of Figures 2 and 3. The unit of the scale bar should be “μm”, not “nm”. The corrected Figures 2 and 3 are presented below.
Figure 2.
The cross section of the (a) thick and (b) thin PLA samples printed on the build-platform heated at 40 °C. The bar in (a) is 500 μm. The bar in (b) is 200 μm.
Figure 2.
The cross section of the (a) thick and (b) thin PLA samples printed on the build-platform heated at 40 °C. The bar in (a) is 500 μm. The bar in (b) is 200 μm.

Figure 3.
The cross section of the (a) thick and (b) thin PLA samples printed on the build-platform heated at 80 °C. The bar in (a) is 500 μm. The bar in (b) is 200 μm.
Figure 3.
The cross section of the (a) thick and (b) thin PLA samples printed on the build-platform heated at 80 °C. The bar in (a) is 500 μm. The bar in (b) is 200 μm.

The authors apologize for any inconvenience caused and the change does not affect the scientific results. The manuscript will be updated, and the original will remain online on the article webpage at https://www.mdpi.com/2073-4360/11/9/1487.
Reference
- Liao, Y.H.; Liu, C.; Coppola, B.; Barra, G.; Di Maio, L.; Incarnato, L.; Lafdi, K. Effect of Porosity and Crystallinity on 3D Printed PLA Properties. Polymers 2019, 11, 1487. [Google Scholar] [CrossRef] [PubMed]
© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).